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pdfjs-dist

6.4.299117M downloads/momozilla/pdf.js ↗New releases in your daily digest, changelog included.

Generic build of Mozilla's PDF.js library.

Last release today
03 Oct 2026
Ships on a steady schedule
a new release about every 4 weeks
Nearly every release is documented
notes for 60 of the last 60 stable releases
Nothing withdrawn
no release was ever pulled
12 years old
1566 releases · first in 2014

Release timeline

1566 releases since 2014

2014201620182020

Releases

6.4.2993 Oct 2026
This release contains improvements for annotation rendering, font conversion, form handling, pattern rendering, performance, text selection and the vi
This release contains improvements for annotation rendering, font conversion, form handling, pattern rendering, performance, text selection and the viewer.

Changes since v6.3.289

Bump the stable version in pdfjs.config by @timvandermeij in #21843

Update dependencies to the most recent versions by @timvandermeij in #21844

Improve the runtime of Chrome tests by @timvandermeij in #21846

Fix the adjacent-page reordering integration test by @calixteman in #21847

Implement unit tests for the error cases in src/core/xml_parser.js by @timvandermeij in #21848

Use arrow functions consistently with Promise catch methods by @Snuffleupagus in #21849

Fix the [Object] param entry in createAndAddNewEditor and three similar slips by @darkdi in #21850

Fix incorrect text stroke width caused by stale pixel-width cache by @HyeryongChoi in #21829

Remove old info logging from the "GetOperatorList"/"GetTextContent" handlers (issue 21836) by @Snuffleupagus in #21840

Get the l10n arguments at once in PDFDocumentProperties.prototype.#parsePageSize by @Snuffleupagus in #21856

Move checks into the ScreenAnnotation.#isPlayAction method by @Snuffleupagus in #21862

Remove the unused fallback parameter from L10n.prototype.get by @Snuffleupagus in #21857

Add a helper to reduce duplication in the collectActions function by @Snuffleupagus in #21863

[api-minor] Expose the operatorList to the operationsFilter callback function (issue 20399) by @Snuffleupagus in #21868

Bump github/codeql-action/analyze from 4.37.7 to 4.37.8 by @dependabot[bot] in #21864

Bump github/codeql-action/autobuild from 4.37.7 to 4.37.8 by @dependabot[bot] in #21865

Bump github/codeql-action/init from 4.37.7 to 4.37.8 by @dependabot[bot] in #21866

Set deployment: false on the code-coverage environment jobs by @calixteman in #21853

Add JSDoc linting by @calixteman in #21855

Account for the Firefox font size quantization in the text layer by @calixteman in #21810

Bump fast-uri from 3.1.5 to 3.1.7 by @dependabot[bot] in #21875

Bump @humanfs/node from 0.16.7 to 0.16.8 by @dependabot[bot] in #21876

Address the high-severity zizmor findings by @calixteman in #21854

Fix the fill area computation for a rotated tiling pattern by @calixteman in #21880

Fix the vertical alignment of the views manager header by @calixteman in #21871

Use moz-message-bar for the Firefox features notification (bug 2057608) by @calixteman in #21874

Replace simple callback functions with arrow functions by @Snuffleupagus in #21879

l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21882

Improve the filename extension detection in MediaAnnotation.prototype._getContentType by @Snuffleupagus in #21887

Shorten some Pattern-handling code a little bit by @Snuffleupagus in #21893

Convert the font seacMap and seacs structures into Maps by @Snuffleupagus in #21884

Modernize the MessageHandler class by @Snuffleupagus in #21883

Convert the CmdCache, NameCache, and RefCache to use Maps by @Snuffleupagus in #21888

Wait for the deferred focus changes in the editor integration tests by @calixteman in #21892

Remove the unused @babel/runtime dependency by @calixteman in #21894

Replace kleur with util.styleText by @calixteman in #21895

Use @napi-rs/canvas for PNG decoding in integration tests by @calixteman in #21896

Fix TextWidgetAnnotation not inheriting text alignment from AcroForm by @diogotcorreia in #21886

Keep the ToUnicode mapping of unencoded glyphs in non-embedded Type1 fonts by @calixteman in #21872

Avoid a CPU DoS when auto-sizing text fields (bug 2069428) by @calixteman in #21889

Fix comment tooltip and highlight test races by @calixteman in #21897

Prevent NaN values in sampled functions with a degenerate Domain by @NakuRei in #21891

Make Ref.fromString more strict, by not accepting "bad" arguments by @Snuffleupagus in #21898

Move the the interpolate helper, such that it can be re-used more in src/core/function.js code by @Snuffleupagus in #21905

Convert the CFFOffsetTracker offsets into a Map by @Snuffleupagus in #21910

Convert the missingGlyphs, used in the Font class, into a Set by @Snuffleupagus in #21911

Bump actions/deploy-pages from 5.0.0 to 5.0.1 by @dependabot[bot] in #21908

Keep editing disabled when switching documents by @calixteman in #21901

Bump github/codeql-action/analyze from 4.37.8 to 4.37.9 by @dependabot[bot] in #21909

Bump github/codeql-action/init from 4.37.8 to 4.37.9 by @dependabot[bot] in #21907

Bump github/codeql-action/autobuild from 4.37.8 to 4.37.9 by @dependabot[bot] in #21906

Fix few intermittents in integration tests with Chrome by @calixteman in #21902

Don't crash when a transfer function array contains /Identity entries by @calixteman in #21903

Add a software fallback for transfer maps by @calixteman in #21912

Wait for editor focus before integration test input by @calixteman in #21913

[GeckoView] Add typed signatures (bug 2069485) by @calixteman in #21900

Use platform print-to-PDF for FreeText appearances (bug 1794809) by @calixteman in #21858

Replace forEach callback functions with arrow functions by @Snuffleupagus in #21915

Remove the ViewHistory.prototype.{get, set} methods by @Snuffleupagus in #21914

Add a way to run the reference tests from a PR label by @calixteman in #21918

Use a "normal" import statement to access the importPrintedAppearances function, in the src/core/worker.js file (PR 21858 follow-up) by @Snuffleupagus in #21923

Let the reftest analyzer load images from absolute URLs by @calixteman in #21928

Fix the magnifier of the reftest analyzer when the images are displayed scaled by @calixteman in #21930

Fix the DirectWrite rendering mode used by the reference tests on Windows by @calixteman in #21931

Bump library version to 6.4 by @Snuffleupagus in #21929

Pin all the ClearType parameters used by the reference tests on Windows by @calixteman in #21932

l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21933

Bump js-yaml by @dependabot[bot] in #21919

Add unit tests checking that a CMap's own mappings take precedence over usecmap ones by @calixteman in #21916

Add a badge showing whether the reference images are up to date by @calixteman in #21925

Stub out OptionalContentConfig, FontLoader, and FontFaceObject code when building for workers by @Snuffleupagus in #21926

Avoid manual loops when generating some simple Arrays/TypedArrays by @Snuffleupagus in #21935

Run the "gets current workerSrc" unit-test in Node.js (PR 17055 follow-up) by @Snuffleupagus in #21937

Utilize Fluent better when localizing the PDFDocumentProperties dialog by @Snuffleupagus in #21938

Update dependencies to the most recent versions by @timvandermeij in #21940

Fix intermittent failures in the PDFDocumentProperties tests (PR 21938 follow-up) by @Snuffleupagus in #21941

Use the waitForTooltipToBe helper function in the annotation integration tests by @timvandermeij in #21943

Change the FontFaceObject.prototype.getPathGenerator cache into a Map by @Snuffleupagus in #21947

Inline the _loadTestFont definition in the FontLoader.prototyp._prepareFontLoadEvent method by @Snuffleupagus in #21948

Use the waitForTextToBe helper function in the editor undo bar integration tests by @timvandermeij in #21949

Re-factor the FontLoader.prototype.isFontLoadingAPISupported getter by @Snuffleupagus in #21950

Use the waitForTextToBe helper function in the editor alert bar integration tests by @timvandermeij in #21951

Re-factor the test-font fallback loading in the FontLoader class by @Snuffleupagus in #21952

Use the waitForTextToBe helper function in the remaining integration tests by @timvandermeij in #21953

Convert the CFFDict classes to use Maps, rather than plain Objects by @Snuffleupagus in #21955

Mark IdentityCMap.prototype.getMap as unreachable by @Snuffleupagus in #21956

Use grayscale text antialiasing in Windows Firefox tests by @calixteman in #21945

Allow tests to reuse installed browsers by @calixteman in #21963

Convert charCodeToGlyphId, used in various font-code, into a Map by @Snuffleupagus in #21961

Fix two FreeText integration tests when running headed on a HiDPI screen by @calixteman in #21962

Define the "argument is Dictionary" callback validation function just once by @Snuffleupagus in #21967

[Firefox] Remove the about:pdf href from the PDF features notification link (bug 2071624) by @calixteman in #21964

Fix unexpected border-radius on the pdfFeaturesNotification bar (bug 2071593) by @jsimplicio in #21966

Remove the createWithNullProto helper from the CFFParser unit-tests by @Snuffleupagus in #21973

Add a helper function for writing array-data in compileFontInfo by @Snuffleupagus in #21976

Validate embedded media content types by @calixteman in #21977

Recover from browser startup and reload failures by @calixteman in #21944

l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21979

Update JBIG2 decoder to pdfium@bb1f9f71 by @calixteman in #21980

Defer the Firefox features notification until after first-page rendering (bug 2072145) by @calixteman in #21981

Settle editor focus before page.focus in integration tests by @calixteman in #21982

Convert the Differences Array, used with non-composite fonts, into a Map by @Snuffleupagus in #21984

Convert the toFontChar Array, in the Font class, into a Map by @Snuffleupagus in #21985

Tighten xref stream field-width validation by @calixteman in #21987

Update dependencies to the most recent versions by @timvandermeij in #21986

[api-minor] Stop sending a separate "test" message during Worker loading by @Snuffleupagus in #21988

Limit cumulative CMap range entries by @calixteman in #21989

Enable the unicorn/prefer-combined-guards linting rule by @timvandermeij in #21990

Remove CLAUDE.md in favor of AGENTS.md by @jarrensj in #21983

Bump codecov/codecov-action from 7.0.0 to 7.1.0 by @dependabot[bot] in #22006

Bump github/codeql-action/analyze from 4.37.9 to 4.38.0 by @dependabot[bot] in #22004

Bump github/codeql-action/autobuild from 4.37.9 to 4.38.0 by @dependabot[bot] in #22005

Bump github/codeql-action/init from 4.37.9 to 4.38.0 by @dependabot[bot] in #22007

Enable the unicorn/prefer-set-methods linting rule by @timvandermeij in #21992

Remove some redundant loop variables by @Snuffleupagus in #22008

Increase the browser protocol timeout by @calixteman in #21995

Remove unnecessary Array copying in the PatternInfo class (PR 20340 follow-up) by @Snuffleupagus in #22003

Enable the unicorn/prefer-smaller-scope linting rule by @timvandermeij in #21993

Enable the unicorn/prefer-short-arrow-method linting rule
Note truncated.

6.3.28929 Aug 2026

This release contains improvements for accessibility, annotation editing, annotation rendering, font conversion, image decoding, performance, text sel

This release contains improvements for accessibility, annotation editing, annotation rendering, font conversion, image decoding, performance, text selection and the viewer.

Changes since v6.2.108

Bump the stable version in pdfjs.config by @timvandermeij in #21655
[Editor] Restore pinch-to-resize on an editor which came back from an undo by @calixteman in #21644
Use more more optional chaining in the src/ folder by @Snuffleupagus in #21661
Avoid duplicate shared object clones by @calixteman in #21658
Avoid mutating source widget parents by @calixteman in #21660
Fix the selection rendering when a page has been destroyed and rendered again (bug 2054348) by @calixteman in #21666
l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21669
Sync the viewer chrome with the Firefox design system by @calixteman in #21665
[api-minor] Convert getJSActions to return data in a Map by @Snuffleupagus in #21664
Use the client coordinates for the pinch-zoom origin by @calixteman in #21659
Re-factor the EventBus to use Map/Set internally by @Snuffleupagus in #21673
Replace simple return if statements with ternary operators by @Snuffleupagus in #21672
Let pointerup/cancel propagate in TouchManager by @calixteman in #21674
Shorten the ViewHistory class a little bit by @Snuffleupagus in #21678
Don't throw on an invalid XML character reference by @calixteman in #21682
Fix the regex used to normalize css fonts in XFA by @calixteman in #21680
Trim the response headers with a backward scan by @calixteman in #21684
Find the PDF filename in a URL hash in two linear steps by @calixteman in #21685
Scan backwards to delete a word in a text field by @calixteman in #21687
Add scripts correctly in Field.prototype.setAction (PR 12569 follow-up) by @Snuffleupagus in #21691
Update dependencies to the most recent versions by @timvandermeij in #21689
Exclude "&" from the XML entity names by @calixteman in #21692
[api-minor] Convert getFieldObjects to return data in a Map by @Snuffleupagus in #21671
Anchor the regex used to extract the XFA path positions by @calixteman in #21686
Don't write numbers in exponential notation when saving a pdf by @calixteman in #21683
Bound the email parts in the autolinker regex by @calixteman in #21693
Safely serialize CSS font family names by @calixteman in #21694
Add a go to first/last menu-item helper method in the Menu class by @Snuffleupagus in #21690
Document how to use the viewer to open files by @martinthomson in #21695
Add integration tests for the Home/End keys in the Menu class by @calixteman in #21706
Bump undici from 7.28.0 to 7.29.0 by @dependabot[bot] in #21701
Bump github/codeql-action/analyze from 4.37.2 to 4.37.3 by @dependabot[bot] in #21705
Bump github/codeql-action/init from 4.37.2 to 4.37.3 by @dependabot[bot] in #21704
Bump github/codeql-action/autobuild from 4.37.2 to 4.37.3 by @dependabot[bot] in #21703
Shorten the Menu constructor a tiny bit by @Snuffleupagus in #21700
Enable the regexp/no-super-linear-move ESLint rule by @calixteman in #21708
Bump fast-uri from 3.1.4 to 3.1.5 by @dependabot[bot] in #21712
Remove the ambiguity from the PostScript number regex by @calixteman in #21709
Avoid an infinite loop on cyclic field Parent chains by @calixteman in #21699
Enable a few more eslint-plugin-regexp rules by @calixteman in #21710
Give copied annotations distinct references by @calixteman in #21707
Use the MathClamp helper in the src/core/annotation.js file by @Snuffleupagus in #21715
Update PDFViewerApplication._initializeAutoPrint to handle getJSActions returning a Map (PR 21664 follow-up) by @Snuffleupagus in #21716
Move SCALE_MATRIX into CanvasGraphics and initialize its DOMMatrix lazily (issue 21720) by @Snuffleupagus in #21721
Convert TranslatedFont.prototype.loadType3Data to an asynchronous method by @Snuffleupagus in #21719
Don't re-encode the file parameter in the viewer by @calixteman in #21718
Add helper methods for populating dateActionsCache/scandCache in the src/scripting_api/util.js file by @Snuffleupagus in #21681
Handle image-only PDF exports by @calixteman in #21717
l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21724
Compute the next ParentTree key correctly by @calixteman in #21714
Expose the table structure attributes in the struct tree by @calixteman in #21702
Track container touches in TouchManager by @calixteman in #21722
Change the inline image cache, in the Parser class, to a Map by @Snuffleupagus in #21727
Convert the charProcOperatorList, used with Type3 fonts, to a Map by @Snuffleupagus in #21730
[api-minor] Convert getPermissions to return data in a Set by @Snuffleupagus in #21738
Improve glyph mapping for non-embedded CID fonts by @calixteman in #21726
Re-name the RefSetCache class to RefMap by @Snuffleupagus in #21737
Expose more tagged PDF structure roles by @calixteman in #21734
Hide unavailable alt text settings by @calixteman in #21735
Keep pinching when the touch set changes by @calixteman in #21731
Replace most toBeTruthy()/toBeFalsy() matchers with more specific ones in the unit-tests by @Snuffleupagus in #21739
Change RefSet and RefMap to use actually private class fields by @Snuffleupagus in #21728
Improve ink drawing responsiveness by @calixteman in #21733
Fix the license text bundled for pdf.js.qcms by @calixteman in #21747
Fix the license file for the bundled Liberation fonts by @calixteman in #21750
Cache the result of buildSymbolGlyphIdEncoding (PR 21726 follow-up) by @Snuffleupagus in #21740
Improve some Array.from() usage by @Snuffleupagus in #21742
Re-use the stringToBytes helper in the encodeASCIIString function by @Snuffleupagus in #21743
[Editor] End active touch gestures on destroy by @calixteman in #21744
Ignore degenerate touch spans when scaling by @calixteman in #21741
Remove overridden/duplicated [$getChildren] methods by @Snuffleupagus in #21736
Remove unnecessary rect modification in the CanvasGraphics.prototype.beginAnnotation method by @Snuffleupagus in #21729
Fix intermittent thumbnail dragging integration test by @calixteman in #21751
Enable the unicorn/no-incorrect-query-selector ESLint plugin rule by @Snuffleupagus in #21754
Bump github/codeql-action/init from 4.37.3 to 4.37.6 by @dependabot[bot] in #21755
Bump github/codeql-action/autobuild from 4.37.3 to 4.37.6 by @dependabot[bot] in #21756
Bump github/codeql-action/analyze from 4.37.3 to 4.37.6 by @dependabot[bot] in #21757
Fix intermittent pinch-resize integration test by @calixteman in #21753
Fix coalesced-events test at fractional device pixel ratios by @calixteman in #21758
Expose PDF alternative text without prohibited ARIA names by @calixteman in #21759
Support two-finger panning by @calixteman in #21752
Tweak the TR/TR2 check in the PartialEvaluator.prototype.setGState method by @Snuffleupagus in #21764
Avoid spilling xref entries into dynamically allocated slots (bug 2060459) by @calixteman in #21766
Add a simple integration-test for the "updatedPreference" event by @Snuffleupagus in #21767
Only define the getRawData API methods when building INTERNAL_VIEWER by @Snuffleupagus in #21772
Remove unnecessary typeof check in Field.prototype.currentValueIndices by @Snuffleupagus in #21774
Avoid creating a couple of intermediate Arrays by @Snuffleupagus in #21773
Fix the two MathClamp calls the prefer-math-clamp fixer mis-ordered by @Jaybhade in #21725
Simplify the Stepper.prototype.getNextBreakPoint method by @Snuffleupagus in #21762
Let the StructElementNode.prototype.tableAttributes getter return a Map by @Snuffleupagus in #21761
l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21775
[Editor] Make HighlightEditor extend DrawingEditor by @calixteman in #21769
Normalize the line ending of test/pdfs/issue9186.pdf.link by @calixteman in #21776
Add a gulp task for releasing pdf.js in the Firefox git tree by @calixteman in #21777
Shorten some Array.prototype.map() callbacks by @Snuffleupagus in #21780
Use Array.prototype.filter(Boolean) more, when filtering out truthy values by @Snuffleupagus in #21781
Nova-ify the viewer (bug 2063405) by @calixteman in #21779
Modernize the XRefMock unit-test helper by @Snuffleupagus in #21782
Use the structure tree to position annotations by @calixteman in #21768
Update dependencies to the most recent versions by @timvandermeij in #21784
Improve Firefox watch builds by @calixteman in #21783
Fix flaky hand tool integration test by @calixteman in #21785
Enable the unicorn/no-multiple-promise-resolver-calls linting rule by @timvandermeij in #21786
Define the visible-page sort function, used in getVisibleElements, once by @Snuffleupagus in #21787
Remove unnecessary !lzwState check in LZWStream.prototype.readBlock by @Snuffleupagus in #21788
Fix the RTL layout of the views manager header (bug 2060033) by @calixteman in #21790
Set the direction of the floating toolbar in RTL locales (bug 2060032) by @calixteman in #21791
Fix intermittent reorganize pages integration tests by @calixteman in #21789
Use Uint8Array.fromHex in the CFFParser unit-tests setup by @Snuffleupagus in #21793
Let link annotations own their text by @calixteman in #21792
Fix Firefox-only tests in Chrome CI by @calixteman in #21795
Downscale large JPEG images with ImageDecoder (bug 2063570) by @calixteman in #21794
Remove unused l10n IDs by @calixteman in #21798
Avoid creating a couple of intermediate Arrays by @Snuffleupagus in #21797
Improve the watchScroll helper function a little bit by @Snuffleupagus in #21796
Auto-close the marked content sections left open in a text object (bug 1898053) by @calixteman in #18151
Improve JpegImage.canUseImageDecoder return value consistency by @Snuffleupagus in #21800
Cache the TextDecoder instances used by the stringToPDFString helper by @Snuffleupagus in #21801
Remove a few unnecessary checks after calling BaseStream.prototype.getBytes by @Snuffleupagus in #21804
Cache the TextDecoder/TextEncoder instances used when compiling/decompiling font-data by

Note truncated.

Open source →

6.2.10828 Jul 2026

This release contains improvements for annotation rendering, annotation editing, font conversion, image conversion, performance, SMask handling and te

This release contains improvements for annotation rendering, annotation editing, font conversion, image conversion, performance, SMask handling and text selection.

Changes since v6.1.200

Bump the stable version in pdfjs.config by @timvandermeij in #21510
Add a workflow to publish the per-test coverage index by @calixteman in #21507
Add support for Sound annotations playing embedded audio by @calixteman in #21501
Remove the BOM from html files (bug 2051221) by @calixteman in #21513
Digital Signature and Certificate verification by @beurdouche in #21247
Bump actions/setup-python from 6.2.0 to 6.3.0 by @dependabot[bot] in #21516
Bump actions/checkout from 6.0.3 to 7.0.0 by @dependabot[bot] in #21518
Bump actions/cache/save from 5.0.5 to 6.1.0 by @dependabot[bot] in #21515
Bump actions/cache/restore from 5.0.5 to 6.1.0 by @dependabot[bot] in #21517
Take into account the current transform when getting font size for FreeText by @calixteman in #20505
Fix the version comment in the font tests GitHub Actions workflow by @timvandermeij in #21519
Fix escapePDFName producing malformed name escapes for control characters by @spokodev in #21522
A couple of SignaturePropertiesManager improvements (PR 21247 follow-up) by @Snuffleupagus in #21524
Serialize GitHub Pages deployments to avoid concurrent deploy failures by @calixteman in #21528
Deduplicate the signature-properties warn/error toolbar icon by @beurdouche in #21530
l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21532
[GeckoView] Add web-digital_signature_properties_manager import map (PR 21247 follow-up) by @Snuffleupagus in #21529
Reduce duplication when updating undoButton/undoCloseButton in PDFThumbnailViewer.prototype.#updateStatus by @Snuffleupagus in #21531
Add basic support for non-embedded TrebuchetMS fonts (issue 21523) by @Snuffleupagus in #21527
Avoid text selection workaround in modern Chromium by @nicolo-ribaudo in #21514
Use the #getPageL10nArgs helper in the PDFThumbnailView.prototype.addPasteButton method by @Snuffleupagus in #21534
Move the bannerStateForResults helper into the SignaturePropertiesManager class (PR 21247 follow-up) by @Snuffleupagus in #21533
Update to Babel 8 by @nicolo-ribaudo in #21475
Apply the appearance-stream scale factor when text is shown, not on setFont by @calixteman in #21525
Do not drop the character after U+FFFE or U+FFFF in encodeToXmlString by @spokodev in #21526
Enable the unicorn/logical-assignment-operators ESLint plugin rule by @Snuffleupagus in #21511
Remove unneeded this.#signatureData = null; lines in src/core/document.js by @Snuffleupagus in #21536
Use the MathClamp helper in the PDFImage.prototype.getComponents method by @Snuffleupagus in #21537
Update dependencies to the most recent versions by @timvandermeij in #21539
Add API unit-tests for getSignatures and getSignatureData (PR 21247 follow-up) by @Snuffleupagus in #21541
Do not drop the character after U+FFFE or U+FFFF in Font.prototype.encodeString by @mahirhir in #21538
Don't needlessly wrap the marked content id-attribute in a string by @Snuffleupagus in #21545
Lookup "lenIV" inline in the Type1Parser.prototype.extractFontProgram method by @Snuffleupagus in #21544
Use Intl.Segmenter for the entire-word search matching by @calixteman in #21521
Implement a unit test for passing unsupported data types to MurmurHash3_64.update() by @timvandermeij in #21546
Add a FakeSignatureVerifier for development mode and TESTING builds (PR 21247 follow-up) by @Snuffleupagus in #21543
Implement unit tests for the getRotationMatrix core utility function by @timvandermeij in #21547
Change Promise-returning worker message-handler functions to be asynchronous by @Snuffleupagus in #21550
l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21555
Replace a couple of indexOf calls with startsWith by @Snuffleupagus in #21554
Bug 2048531 - Improve selection contrast in dark mode by @nicolo-ribaudo in #21553
Use for...of even more in the code-base by @Snuffleupagus in #21560
Update dependencies to the most recent versions by @timvandermeij in #21561
Use direct return await a bit more in the src/core/ folder by @Snuffleupagus in #21563
Improve the GitHub Actions workflow triggers and requirements by @timvandermeij in #21562
Commit the current editing session before saving (bug 2047516) by @calixteman in #21568
Preserve non-local PDF link destinations by @calixteman in #21565
Preserve Unicode destination and attachment names by @calixteman in #21566
Handle indirect and dangling structure tree root kids by @calixteman in #21567
Preserve OBJR children without restoring deleted pages by @calixteman in #21569
Skip setFillColorN/setStrokeColorN operators without valid arguments (issue 21570) by @Snuffleupagus in #21574
Bump github/codeql-action/init from 4.36.2 to 4.36.3 by @dependabot[bot] in #21571
Bump github/codeql-action/autobuild from 4.36.2 to 4.36.3 by @dependabot[bot] in #21572
Bump github/codeql-action/analyze from 4.36.2 to 4.36.3 by @dependabot[bot] in #21573
Add a getOrPutComputed method in the RefSetCache class by @Snuffleupagus in #21576
Fix decryption of AES-256 revision 5 PDFs with non-ASCII passwords by @calixteman in #21580
Reduce duplication in CipherTransformFactory.prototype.createCipherTransform by @Snuffleupagus in #21581
Support SASLprep for AES-256 revision 6 passwords by @calixteman in #21583
Fix signature fields with widget children by @calixteman in #21575
Fix AcroForm appearance resources when merging pages by @calixteman in #21577
Use Map.prototype.getOrInsertComputed more in the web/ folder by @Snuffleupagus in #21586
l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21589
Use getOrInsertComputed in the CanvasGraphics.prototype._getPattern method by @Snuffleupagus in #21590
Use Iterator methods to avoid some unnecessary Array creation by @Snuffleupagus in #21592
Start using Iterator.prototype.join in the code-base by @Snuffleupagus in #21585
Re-factor the bCache, used with /Mesh Shadings by @Snuffleupagus in #21596
Change the CompiledFont glyph/charCode caches to use Maps by @Snuffleupagus in #21595
Implement SmaskInData == 2 for JPX images by @calixteman in #21587
Rebuild missing AcroForm fields by @calixteman in #21591
Handle revisioned structure attributes by @calixteman in #21588
[api-minor] Convert getDestinations to return data in a Map by @Snuffleupagus in #21597
Download the per-test coverage index by @calixteman in #21598
Combine the getPathJs and hasBuiltPath methods in the CompiledFont class by @Snuffleupagus in #21599
Address follow-up review comments in coverage_search.mjs by @calixteman in #21605
Ignore Annotations with fieldValue = null when saving (issue 21582) by @Snuffleupagus in #21594
Encode i32.const immediates as signed LEB128 in the PostScript Wasm compiler by @uwezkhan in #21601
Fix parsing of ambiguous date formats like Hm by @calixteman in #21606
Update the file format entries in .gitattributes by @timvandermeij in #21603
Update dependencies to the most recent versions by @timvandermeij in #21602
Copy the backdrop for non-isolated groups with a soft mask by @calixteman in #21604
[api-minor] Convert getViewerPreferences to return data in a Map by @Snuffleupagus in #21607
Bump actions/setup-node from 6.4.0 to 7.0.0 by @dependabot[bot] in #21612
Bump github/codeql-action/analyze from 4.36.3 to 4.37.0 by @dependabot[bot] in #21611
Bump github/codeql-action/init from 4.36.3 to 4.37.0 by @dependabot[bot] in #21613
Bump github/codeql-action/autobuild from 4.36.3 to 4.37.0 by @dependabot[bot] in #21614
Re-use the NS_DATASETS constant more in the src/core/xfa/bind.js file by @Snuffleupagus in #21615
Preserve indirect AcroForm resources by @calixteman in #21616
Improve the Ref.prototype.toString method a tiny bit by @Snuffleupagus in #21618
[api-minor] Convert getOpenAction to return data in a Map by @Snuffleupagus in #21621
Improve the detection of the changes made after a document has been signed by @calixteman in #21620
Document the preserve and dependencyLists params for recordOperation by @LuShadowX in #21622
l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21623
Bump linkify-it from 5.0.1 to 5.0.2 by @dependabot[bot] in #21625
Remove the objectSize helper function by @Snuffleupagus in #21624
Preserve inherited text field appearances by @calixteman in #21626
Re-factor the XRef class to use private fields by @Snuffleupagus in #21631
Use the toBeNull() matcher consistently in the unit/integration tests by @Snuffleupagus in #21632
Use the toBeUndefined() matcher consistently in the unit tests by @Snuffleupagus in #21633
Use the toThrowError() matcher consistently in the unit tests by @Snuffleupagus in #21636
Use the toBeFalse() matcher consistently in the unit/integration tests by @Snuffleupagus in #21634
Use the toBeTrue() matcher consistently in the unit/font/integration tests by @Snuffleupagus in #21635
Preserve inherited signature flags by @calixteman in #21628
Detect inherited signature fields in form info by @calixteman in #21630
Bump fast-uri from 3.1.2 to 3.1.4 by @dependabot[bot] in #21627
Add the Firefox features notification bar to the viewer (bug 2057608) by @calixteman in #21629
Update dependencies to the most recent versions by @timvandermeij in #21639
Convert the /Indexed palette in a single base color space call by @calixteman in #21637
Convert shading colors in bulk, rather than one at a time by @calixteman in #21641
Reduce a tiny bit of duplication in the normalizeBlendMode helper by @Snuffleupagus in #21642
Bump actions/checkout from 7.0.0 to 7.0.1 by @dependabot[bot] in #21651
Change defaultOptions, in the web/app_options.js file, to a Map by @Snuffleupagus in #21640
Bump actions/setup-python from 6.3.0 to 7.0.0 by @dependabot[bot] in #21647
Bump github/codeql-action/init from 4.37.0 to 4.37.2 by @dependabot[bot] in #21648
Bump github/codeql-action/analyze from 4.37.0 to 4.37.2 by @dependabot[bot] in #21649
Bump github/codeql-action/autobuild from 4.37.0 to 4.37.2 by @dependabot[bot] in #21650
Shorten Catalog.prototype.jsActions getter and AnnotationElement.prototype._getElementsByName a tiny bit by @Snuffleupagus in #21653
Update qcms wrapper by @calixteman in #21646
Update the signatures-helpers to actually handle MissingDataExceptions by @Snuffleupagus in #21652
Avoid cycles when walking some trees by @calixteman in #21654

Open source →

6.1.20027 Jun 2026

This release contains improvements for annotation rendering, annotation editing, font conversion, image conversion, merging files, SMask rendering and

This release contains improvements for annotation rendering, annotation editing, font conversion, image conversion, merging files, SMask rendering and the viewer.

Changes since v6.0.227

Bump the stable version in pdfjs.config by @timvandermeij in #21360
Disable WebGPU for Firefox tests by @timvandermeij in #21364
Skip the format 4 cmap sub-table when it doesn't fit its 16-bits fields by @calixteman in #21365
Use the MathClamp helper function in the src/display/canvas.js file by @Snuffleupagus in #21367
Update the StringStream constructor to accept an optional dictionary argument by @Snuffleupagus in #21366
Mark a couple of viewer, and editor, EventBus listeners as "internal" by @Snuffleupagus in #21368
Improve the BaseStream.prototype.clone implementations by @Snuffleupagus in #21371
Add an integration-test for clicking on internal links in presentation mode by @Snuffleupagus in #21373
Fix intermittent failure in the "must check that a freetext is still here after having updated it and scroll the doc" freetext editor integration test by @timvandermeij in #21361
Restore editor layer state for unchanged pages after page mutations by @calixteman in #21347
Render gray transparency groups in grayscale by @calixteman in #21372
Fix broken enableSelectionRendering: false by @wooorm in #21378
Implement proper serialization of OptionalContentConfig by @Snuffleupagus in #21349
[api-minor] Add support for /AuthEvent, on-demand decryption by @wooorm in #21351
Run browser tests to collect code coverage data by @Snuffleupagus in #21359
Bump github/codeql-action from 4.35.5 to 4.36.0 by @dependabot[bot] in #21382
Remove the #externalHide field from the AnnotationLayerBuilder class by @Snuffleupagus in #21380
Extend the AppOptions unit-tests to also cover the EVENT_DISPATCH option-kind by @Snuffleupagus in #21385
Shorten the getBytes method in the Stream/ChunkedStream classes by @Snuffleupagus in #21384
Add knockout_inner_backdrop ref test by @calixteman in #21383
Deduplicate shared font/image streams when merging PDFs by @calixteman in #21379
Bug 2035251 - Use toolkit's pdf icon as favicon by @sfoster in #21358
Match editor keyboard shortcuts by event.code as a fallback by @calixteman in #21350
Update the README in order to add some info about code coverage by @calixteman in #21389
fix typo in bit flag value for suppressCropClip by @KonstantinRight in #21386
Reject the stream-capability when aborting the ChunkedStreamManager by @Snuffleupagus in #21387
Strip the JBIG2 file header from JBIG2Decode streams by @calixteman in #21388
Add one more unit-test case for invalid email domains in the Autolinker class by @Snuffleupagus in #21392
Add a unit-test for passing a filesystem URL-string (in Node.js) to getDocument by @Snuffleupagus in #21391
Add a unit-test for passing a binary string to getDocument by @Snuffleupagus in #21390
Add basic integration-tests for the PDFCursorTools functionality by @Snuffleupagus in #21393
Shorten the DrawLayerBuilder.prototype.cancel method a tiny bit by @Snuffleupagus in #21395
Prevent intermittent issues when invoking the PDFPageView.prototype.#injectLinkAnnotations method by @Snuffleupagus in #21396
Upgrade codecov/codecov-action to version 7.0.0 by @timvandermeij in #21398
Run various test-suite when the external/ folder is modified by @Snuffleupagus in #21400
Update dependencies to the most recent versions by @timvandermeij in #21402
Update quickjs to rev 3d5e064e9dd67c70f7962836505a7fa067bf0a4e by @calixteman in #21399
fixed typo in README.md by @matasaru in #21404
Fix transparent color of ::selection in Firefox by @wooorm in #21408
Remove the Map.prototype.getOrInsertComputed polyfill from the scripting implementation (PR 21399 follow-up) by @Snuffleupagus in #21405
Bump actions/checkout from 6.0.2 to 6.0.3 by @dependabot[bot] in #21420
Bump github/codeql-action from 4.36.0 to 4.36.1 by @dependabot[bot] in #21421
Handle TR2 with /Default entry by @calixteman in #21414
[api-minor] Convert getAttachments to return data in a Map by @Snuffleupagus in #21418
Add a PDFViewer helper method for setting #printingAllowed and dispatching the event by @Snuffleupagus in #21409
Fix form fields with their own canvas updated on non-rendered pages by @calixteman in #21407
[CRX] List all viewer-accessible schemes in the connect-src CSP by @calixteman in #21419
Improve rendering of comb text fields by @calixteman in #21413
Drop 'unsafe-inline' from the CSP style-src directives by @calixteman in #21416
Use the convertBlackAndWhiteToRGBA helper with grayscale images in putBinaryImageData by @Snuffleupagus in #21427
Fix the unit-tests for on-demand password handling of encrypted attachments (issue 21425) by @Snuffleupagus in #21429
l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21433
Handle corrupt PDFs that lack /Kids array and just inline the /Page dictionary (issue 21436) by @Snuffleupagus in #21437
Use the checkboxes and radio button appearances as defined in the pdf to render them in the annotation layer (bug 1802506) by @calixteman in #18907
[api-minor] Remove the unused convertToViewportRectangle method in the PageViewport class by @Snuffleupagus in #21426
Use the isDict helper function in a few more places by @Snuffleupagus in #21431
Use Map.prototype.getOrInsertComputed() more in the code-base by @Snuffleupagus in #21439
Re-factor the isSourcePDF handling in the JpegImage class by @Snuffleupagus in #21441
Reduce duplication when invoking finishWorkerTask by @Snuffleupagus in #21443
Update dependencies to the most recent versions by @timvandermeij in #21446
Add an integration-test for merging a corrupt PDF by @Snuffleupagus in #21452
Add an integration-test for merging a password-protected PDF by @Snuffleupagus in #21444
Use the convertRGBToRGBA helper with RGB images in putBinaryImageData by @Snuffleupagus in #21440
Fix intermittent failure in the must check that the comment sidebar is resizable comment integration test by @timvandermeij in #21448
Don't download Puppeteer browsers on npm install by @timvandermeij in #21453
Upgrade eslint-plugin-unicorn to version 66.0.0 by @timvandermeij in #21454
Resolve checkbox/radio export values from the 'Opt' entry by @calixteman in #21428
Remove the unused HighlightOutline.prototype.classNamesForOutlining getter by @Snuffleupagus in #21456
Remove unneeded check in the "GetAnnotationsByType" worker-thread handler by @Snuffleupagus in #21457
Draw non-isolated blend-mode groups against their backdrop (bug 1873345) by @calixteman in #21455
Bump github/codeql-action from 4.36.1 to 4.36.2 by @dependabot[bot] in #21461
Use ternary expressions to shorten code in src/core/editor/pdf_editor.js by @Snuffleupagus in #21459
Bump markdown-it from 14.1.1 to 14.2.0 by @dependabot[bot] in #21464
Adjust the 'BaseException' unit-test for the 'Error.stack' changes in Firefox by @calixteman in #21463
Don't clamp BlueScale up when a font genuinely has small zones by @calixteman in #21462
Check every LinkAnnotation when testing if inferred links overlap (issue 21458) by @Snuffleupagus in #21460
Add a 'supportsDownloading' browser option to gate saving/downloading by @calixteman in #21310
Re-derive annotation attachment content from the xref after cleanup by @calixteman in #21465
Remove unused branches in the src/display/canvas.js file by @Snuffleupagus in #21467
Avoid too long BlueScale value when rewriting a CFF font by @calixteman in #21469
l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21471
Add a unit-test for relative URI actions specified as /Name instances by @Snuffleupagus in #21476
Remove unnecessary explicit return statements in CanvasGraphics.prototype.showText by @Snuffleupagus in #21473
Bump undici from 7.24.3 to 7.28.0 by @dependabot[bot] in #21472
Stop event propagation, for the Enter key, in the passwordPrompt input by @Snuffleupagus in #21482
Remove the unused AnnotationEditorUIManager.prototype.isSelected method by @Snuffleupagus in #21470
Use the isDict helper in the Catalog.prototype.metadata getter by @Snuffleupagus in #21481
Don't swallow MissingDataExceptions in the Annotation.prototype.#setOptionalContent method (PR 21313 follow-up) by @Snuffleupagus in #21479
A couple of small tweaks of the StructElementNode.prototype.mathML getter by @Snuffleupagus in #21480
Vertically center the glyphs in comb text fields by @calixteman in #21478
Reset alpha before drawing a colored glyph in type 3 font by @calixteman in #21483
Use AES256 for V=5 documents with a mislabeled AESV2 crypt filter (bug 2046659) by @calixteman in #21485
Add support for RichMedia annotations by @calixteman in #21474
Remove the AnnotationEditorUIManager and IdManager test-only reset methods (PR 19809 follow-up) by @Snuffleupagus in #21489
Sort the mappings last in the readCmapTable function (PR 19321 follow-up) by @Snuffleupagus in #21491
Improve the sink handling in getTextContent for Highlight annotations (PR 20019 follow-up) by @Snuffleupagus in #21486
Add support for Screen annotations playing embedded media by @calixteman in #21490
Update dependencies to the most recent versions by @timvandermeij in #21492
Include the catalog instance in the annotationGlobals data by @Snuffleupagus in #21488
Bump library version to 6.1 by @Snuffleupagus in #21499
Tweak some String.prototype.substring() usage by @Snuffleupagus in #21497
Change issue17906 to test "forms" rendering by @Snuffleupagus in #21502
Move SVG text selection styles to pdf_viewer.css (bug 2049302) by @nicolo-ribaudo in #21504
Render non-empty glyph 0 for char code 0 by @calixteman in #21487
Disable selection rendering when backdrop-filter is unsupported (bug 2050191) by @calixteman in #21500
Inline the init method in the StructTreeRoot constructor by @Snuffleupagus in #21505
Use more optional chaining in the src/ and web/ folders by @Snuffleupagus in #21508

Open source →

6.0.22730 May 2026

PDF.js 6.0 is a major release that contains a number of API changes, features and bugfixes.

The complete list of changes in this release is shown below. If you're upgrading to PDF.js 6.0 we recommend checking the changes prefixed with [api-minor] and [api-major] since those might require updates to your code.

Changes since v5.7.284

Bump the stable version in pdfjs.config by @timvandermeij in #21177
Improve the performances of "gulp lint" by @calixteman in #21169
Convert Catalog.prototype.getPageIndex to an asynchronous method by @Snuffleupagus in #21181
Split integration tests into per-browser jobs by @calixteman in #21179
Bump actions/setup-node from 6.3.0 to 6.4.0 by @dependabot[bot] in #21182
Split the unit/font tests into per-browser jobs by @timvandermeij in #21183
Send 'Terminate' to the worker when destroy races the load-time handshake (bug 1942304) by @calixteman in #21175
Collect worker-side coverage for browser unit tests by @calixteman in #21178
Fix HCM colors for the views-manager massive unselect button (bug 2035551) by @calixteman in #21187
Use Istanbul instrumentation for unittestcli code coverage by @calixteman in #21189
Add an abstract readBlock method in the DecodeStream class by @Snuffleupagus in #21190
Move unittestcli coverage collection to ci.yml by @timvandermeij in #21191
Fix the intermittent test failure 'performs a search in a text containing some Hangul syllables' by @calixteman in #21193
Slighty improve codecov stuff in gh actions by @calixteman in #21194
Improve error handling in the PDFFindController.prototype.#extractText method by @Snuffleupagus in #21197
Wait for the first page to be ready in the reorganize pages integration tests by @timvandermeij in #21186
Simplify the nextChunk handling in the DecryptStream class by @Snuffleupagus in #21198
Shorten how intersectors are added to the grid in the Intersector constructor by @Snuffleupagus in #21200
Optimize memory usage in the unit tests by @timvandermeij in #21195
Remove obsolete pdfBug: true flag in the image caching unit test by @timvandermeij in #21203
Add some colors in the logs in order to easily see failures and add a summary of the failures at the end by @calixteman in #21192
Improve performance of the "caches image resources at the document/page level as expected (issue 11878)" unit-test by @Snuffleupagus in #21206
Use a reduced test-case for the "caches image resources at the document/page level as expected (issue 11878)" unit-test by @Snuffleupagus in #21207
Fix free highlight on pages without images (bug 2035530) by @calixteman in #21196
l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21208
[api-major] Update the minimum supported browsers, and remove no longer needed polyfills by @Snuffleupagus in #21152
[api-minor] Use the ImageDecoder by default on Chrome by @calixteman in #20961
Bump library version to 6.0 by @Snuffleupagus in #21209
Optimize runtime of the find controller unit tests by @timvandermeij in #21210
Don't provide unused /DecodeParms when initializing JpxStream by @Snuffleupagus in #21211
Remove the CompilerOutput.prototype.finalData getter, and a few other font improvements (PR 21053 follow-up) by @Snuffleupagus in #21214
Replace a loop with TypedArray.prototype.set() in the compileFDSelect method by @Snuffleupagus in #21215
Remove the unused raw field from the CFFCharset class by @Snuffleupagus in #21216
Replace TrueTypeTableBuilder and CompilerOutput with a single class by @Snuffleupagus in #21220
Add an abstract WasmImage class, that JBig2CCITTFaxImage and JpxImage inherit from by @Snuffleupagus in #21225
Clear the text layer container when cancelling rendering by @calixteman in #21219
Run unit-tests in Node.js version 26 by @Snuffleupagus in #21224
A couple of small tweaks of the getPdfFilenameFromUrl helper by @Snuffleupagus in #21222
Include the external/ folder in the coverage report for gulp unittestcli by @Snuffleupagus in #21226
Tweak the WasmImage implementation a little bit (PR 21225 follow-up) by @Snuffleupagus in #21229
Bump ip-address from 10.1.0 to 10.2.0 by @dependabot[bot] in #21232
Make sure the focus moves on the first page of the added pdf after a merge (bug 2034827) by @calixteman in #21223
Place new annotations on the correct page when extracting pages (bug 2027682) by @calixteman in #21228
Improve soft mask composition performance (bug 2033095) by @calixteman in #21235
Simplify '#getFilteredPageIndices' and '#resolveInsertAfterIndices' by @calixteman in #21231
l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21237
Bump fast-xml-builder from 1.1.5 to 1.2.0 by @dependabot[bot] in #21243
Bump fast-uri from 3.1.0 to 3.1.2 by @dependabot[bot] in #21244
Bump @babel/plugin-transform-modules-systemjs from 7.29.0 to 7.29.4 by @dependabot[bot] in #21248
Make the PDFDataRangeTransport streaming unit-tests faster by @Snuffleupagus in #21238
Use Uint8Array.fromHex in test/unit/crypto_spec.js by @Snuffleupagus in #21246
Fall back to pixel-buffer SMask filtering when ctx.filter is unavailable by @calixteman in #21236
[api-major] Remove support for calling getDocument without a parameter object, and remove the PDFDocumentProxy.prototype.destroy method by @Snuffleupagus in #21245
Support providing a filename unconditionally, when passing binary data to PDFViewerApplication.open by @Snuffleupagus in #21249
perf: Avoid multi-second getDestinations stalls for PDFs with many named destinations by @saripovdenis in #21213
Avoid cycles when getting operator list in patterns by @calixteman in #21230
Move the getModificationDate helper function into src/core/core_utils.js by @Snuffleupagus in #21258
Update the deepCompare helper function to handle Refs and Names correctly by @Snuffleupagus in #21257
Render knockout transparency groups by @calixteman in #21242
Update dependencies to the most recent versions by @timvandermeij in #21256
Bump github/codeql-action from 4.35.2 to 4.35.3 by @dependabot[bot] in #21265
Use FeatureTest.isCanvasFilterSupported in _bakeSMaskCanvas by @calixteman in #21264
[Editor] Avoid "generating" the l10n-ids used for the a11yAlert by @Snuffleupagus in #21263
Fix nested non-isolated groups in knockout rendering by @calixteman in #21262
Remove the executable bit from test PDF files by @timvandermeij in #21267
Avoid bundling DOM-related code in the built pdf.worker.mjs file by @Snuffleupagus in #21269
Collect coverage information for the integration tests by @timvandermeij in #21173
Add a lint-chmod task to catch stray executable bits by @calixteman in #21268
Add a simple API unit-test for /BrotliDecode by @Snuffleupagus in #21271
Enable Codecov flag carryforward for accurate coverage badge by @calixteman in #21274
Ensure TextLayer hiddenCanvasElement is layout-neutral by default by @RolandWArnold in #21218
l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21278
Move the stringToPDFString helper function to the worker-thread by @Snuffleupagus in #21279
Remove the Util.domMatrixToTransform method by @Snuffleupagus in #21281
Clear the full SMask scratch canvas in compose() by @calixteman in #21277
[api-minor] Move the getXfaPageViewport helper into the XfaLayer class by @Snuffleupagus in #21283
Move the SVG_NS definition into src/shared/util.js by @Snuffleupagus in #21284
Add a couple of very basic ColorConverters unit-tests by @Snuffleupagus in #21286
Remove the unused Outline._normalizePagePoint method by @Snuffleupagus in #21287
Add an integration-test for the page-name fuzzy matching in the PDFDocumentProperties dialog by @Snuffleupagus in #21289
Add an integration-test for documents without contentLength available in the PDFDocumentProperties dialog by @Snuffleupagus in #21291
Enable the must check that an existing highlight is ignored on hovering integration test on Windows by @timvandermeij in #21288
Optimize runtime and memory usage of the integration tests by @timvandermeij in #21275
Recover CFF private dict defaults zeroed by Ghostscript by @calixteman in #21290
Add a Content-Security-Policy to pdf.js' viewer.html (bug 1960363) by @calixteman in #21261
Move the Util.scaleMinMax helper into src/display/canvas_dependency_tracker.js by @Snuffleupagus in #21294
Add more integration-tests, with multi-page documents, for the PDFDocumentProperties dialog by @Snuffleupagus in #21295
Introduce integration tests for the presentation mode functionality by @timvandermeij in #21292
Disable hardware acceleration for Chrome tests by @timvandermeij in #21299
Make text selection more visible (bug 1879559) by @wooorm in #20981
Fix 'Select all' after #20981 by @calixteman in #21309
Don't use "internal" EventBus methods in the integration-tests by @Snuffleupagus in #21305
Bump actions/create-github-app-token from 3.1.1 to 3.2.0 by @dependabot[bot] in #21301
Bump github/codeql-action from 4.35.3 to 4.35.4 by @dependabot[bot] in #21302
Extend unit-test coverage for the getPdfFilenameFromUrl helper function by @Snuffleupagus in #21311
Add basic integration-tests for the PdfTextExtractor class by @Snuffleupagus in #21304
Allow merging a PDF by dropping it onto the thumbnail viewer by @calixteman in #21306
Sanitize glyf composite cycles, OS/2 length and maxp version mismatches by @calixteman in #21300
l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21316
Use the CFF program directly for CID fonts wrapped in OpenType FontFile3 by @calixteman in #20542
Shorten the fontFile lookup a tiny bit by @Snuffleupagus in #21322
Shorten the XfaLayerBuilder.prototype.render method by @Snuffleupagus in #21317
Use Uint8Array.fromBase64 in the test/integration/highlight_editor_spec.mjs file by @Snuffleupagus in #21323
Simplify how the character BBox is scaled in src/display/canvas_dependency_tracker.js by @Snuffleupagus in #21324
Add support for Optional Content in the AnnotationLayer (issue 20433) by @Snuffleupagus in #21313
Fix the XRefWrapper implementation, in the src/core/editor/pdf_editor.js file by @Snuffleupagus in #21319
Keep the first /Subrs and /CharStrings block by @calixteman in #21315
Substitute a system font when an embedded CFF is truncated by @calixteman in #21320
Update dependencies to the most recent versions by @timvandermeij in #21328
Recover CFF FontBBox with negative coordinates encoded as unsigned 16-bit by @calixteman in #21314
Force the text selection color to be in light mode by @calixteman in #21329
Prevent inherited spacing from affecting text layer by @danyalahmed1995 in #21321
Avoid a temporary variable and return results directly in a couple of functions by @Snuffleupagus in #21332
Load the predefined CMap for composite fonts that omit the FontDescriptor by @calixteman in #21331
Enable 'eslint-plugin-regexp' and fix existing findings by @calixteman in #21330
Recover the browser session on test timeout to keep running subsequent tests by @calixteman in #21333
Run unit-tests and integration-tests when the external/builder/ folder is changed by @Snuffleupagus in

Note truncated.

Open source →

5.7.28427 Apr 2026

This release contains improvements for accessibility, annotations, the annotation editor, font conversion, image conversion, performance, shading patt

This release contains improvements for accessibility, annotations, the annotation editor, font conversion, image conversion, performance, shading pattern rendering, SMask rendering and the viewer.

Changes since v5.6.205

Bump the stable version in pdfjs.config by @timvandermeij in #21004
[api-minor] Rewrite the ps lexer & parser and add a small Wasm compiler by @calixteman in #21002
[Node.js] Remove the node-readable-to-web-readable-stream polyfill by @Snuffleupagus in #21007
Add attachments when merging/reorganizing a pdf (bug 2026956) by @calixteman in #21013
Don't use an intermediate canvas when rendering a tiling pattern bigger than the rectangle to fill by @calixteman in #18815
Avoid expressions duplication in the ps AST and use a local instead when compiling to WASM by @calixteman in #21008
Add support for function-based shadings (bug 1254066) by @calixteman in #21012
Add an interpreter for optimized ps code by @calixteman in #21010
Encrypt pdf data when merging the same pdf (bug 2028369) by @calixteman in #21022
Use the MathClamp helper function more by @Snuffleupagus in #21026
l10n: Update locale files by @github-actions[bot] in #21033
Use OffscreenCanvas unconditionally in the web/pdf_thumbnail_view.js file by @Snuffleupagus in #21021
Fix wrong values when sanitizing fonts by @calixteman in #21031
A couple of small collectAnnotationsByType improvements by @Snuffleupagus in #21034
Move the MathClamp helper function to its own file by @Snuffleupagus in #21027
Replace all Object.prototype.hasOwnProperty usage with Object.hasOwn by @Snuffleupagus in #21029
[api-minor] Change PDFDataRangeTransport to use a single (internal) listener by @Snuffleupagus in #21028
Fix radial gradient when the two circles have an intersection by @calixteman in #21014
Add a js fallback for interpreting ps code by @calixteman in #21023
Get the right transform for a pattern before filling some text by @calixteman in #21019
Add an eslint plugin for using MathClamp when it's possible by @calixteman in #21030
Fix the annotation base transform before drawing it by @calixteman in #21020
Remove the unused compilePostScriptToIR function (PR 21023 follow-up) by @Snuffleupagus in #21037
[api-minor] Remove PostScriptCompiler and PostScriptEvaluator, since it's now dead code (PR 21023 follow-up) by @Snuffleupagus in #21005
Fix comments for (is/has)Singlefile in pdf_editor by @calixteman in #21036
Update dependencies to the most recent versions by @timvandermeij in #21035
Use the calculateMD5 helper, from test/downloadutils.mjs, in test/add_test.mjs by @Snuffleupagus in #21038
Introduce a function type enumeration by @timvandermeij in #21041
Use the original array-data when parsing Type 0 (Sampled) Functions by @Snuffleupagus in #21040
Fix intermittent failure in the "must check that the comment sidebar is resizable with the keyboard" comment integration test by @timvandermeij in #21045
Fix intermittent integration test failures related to checking the find count results text by @timvandermeij in #21043
[api-minor] Update the minimum supported Node.js version to 22 by @Snuffleupagus in #21018
Remove unnecessary "flooring" of the components when setting the Annotation borderColor by @Snuffleupagus in #21047
Replace individual AI/ML disabling preferences with the single killswitch preference in the tests by @timvandermeij in #21046
Shorten the src/core/postscript/ code a tiny bit by @Snuffleupagus in #21048
Unconditionally create a gpu device by @calixteman in #21049
Use the stringToBytes helper in the PDFEditor.prototype.writePDF method by @Snuffleupagus in #21051
Fix the l10n-id for the sidebar toggleButton, in the ViewsManager class by @Snuffleupagus in #21055
Reduce allocations when compiling CFF fonts by @Snuffleupagus in #21053
Fix the way to write numbers when saving a pdf by @calixteman in #21054
Make sure the thumbnails positions are recomputed after a structural change but after a reflow has been done (bug 2028193) by @calixteman in #21059
Bump github/codeql-action from 4.33.0 to 4.35.1 by @dependabot[bot] in #21056
Replace a couple of loops with TypedArray.prototype.fill() in the src/core/ascii_85_stream.js file by @Snuffleupagus in #21050
Bump actions/deploy-pages from 4.0.5 to 5.0.0 by @dependabot[bot] in #21058
Bump codecov/codecov-action from 5.5.2 to 6.0.0 by @dependabot[bot] in #21057
Avoid as much as possible to have intermediate canvases by @calixteman in #21061
Reduce allocations in CFFCompiler.prototype.compileIndex (PR 21053 follow-up) by @Snuffleupagus in #21062
Dont revoke blob URLs while printing but do it after by @calixteman in #21065
Update the position when calling ChunkedStream.prototype.getBytes without a length by @Snuffleupagus in #21070
Add constants for defining the initial BBox and Float32 BBox by @Snuffleupagus in #21071
Bump basic-ftp from 5.2.0 to 5.2.1 by @dependabot[bot] in #21067
Use a TypedArray when building the "hmtx" font table by @Snuffleupagus in #21072
l10n: Update locale files by @github-actions[bot] in #21074
Move some TrueType header comments to the correct lines by @Snuffleupagus in #21073
Re-factor the OpenTypeFileBuilder class to use a DataView when writing data by @Snuffleupagus in #21076
Take into account the alignment when printing/saving a comb field by @calixteman in #21069
Re-factor the CFFParser class to use DataViews when reading data by @Snuffleupagus in #21079
Re-factor the JpegImage class, and related code, to use DataViews when reading data by @Snuffleupagus in #21086
Bump basic-ftp from 5.2.1 to 5.2.2 by @dependabot[bot] in #21083
Fix how the text is printed/saved in a comb field when it's a RTL one by @calixteman in #21082
Re-factor the Jbig2Image class, and related code, to use DataViews when reading data by @Snuffleupagus in #21087
Remove the int32 helper, and replace it with DataView usage, in src/core/fonts.js by @Snuffleupagus in #21088
Remove pattern fill when setting fill color before drawing a tile by @calixteman in #21090
[Debugger] Fix the content stream rendering when it's a ref to an array by @calixteman in #21091
Use the stopEvent helper function in the AnnotationEditorLayer class by @Snuffleupagus in #21092
Avoid infinite recursion while compiling a glyph by @calixteman in #21080
Update dependencies to the most recent versions by @timvandermeij in #21093
Re-factor the FontRendererFactory class, and related code, to use DataViews when reading data by @Snuffleupagus in #21077
Remove readUint32 usage from the isTrueTypeFile function by @Snuffleupagus in #21078
Take into account CharProcs keys when computing the type3 hash by @calixteman in #21095
Use TypedArrays when building more TrueType tables by @Snuffleupagus in #21097
Remove the workaround for bug 1820511 by @calixteman in #21098
Add the UI for merging PDFs (bug 2028071) by @calixteman in #21060
Fix blending issues while compositing by @calixteman in #21096
Use the gpu for drawing meshes only when it has more than 16 triangles (bug 2030745) by @calixteman in #21099
Correctly sync the transform on the scratch canvas by @calixteman in #21094
Fix dependency tracking in pattern fill by @nicolo-ribaudo in #21102
Use TypedArrays when building even more TrueType tables by @Snuffleupagus in #21100
Improve SMask compositing by pre-baking backdrop and filter by @calixteman in #21101
Remove the basic Math.sumPrecise polyfill by @Snuffleupagus in #20958
Fix saveDocument JSDoc return type by @supermar1010 in #21107
Use TypedArrays in the createCmapTable function by @Snuffleupagus in #21103
Fix integration tests failing because the focus isn't on the right element by @calixteman in #21104
Add an option -j XX for browser tests in order to set the number of jobs by @calixteman in #21108
Use TypedArrays in the createNameTable function by @Snuffleupagus in #21112
l10n: Update locale files by @github-actions[bot] in #21114
Improve reftest runner performance by @calixteman in #21111
Store the Type1 program privateData in a Map, rather than an Object by @Snuffleupagus in #21116
Update dependencies to the most recent versions by @timvandermeij in #21117
Update GitHub workflow actions to the most recent versions by @timvandermeij in #21118
Improve reftest runner memory usage and load balancing by @calixteman in #21115
Fix the gets text content, with correct properties (issue 8276) unit test by @timvandermeij in #21123
Correctly compute the bbox when simplifying the path construction by @calixteman in #21127
Remove user and password from URLs (bug 2025109) by @calixteman in #21128
Fix unit test for dependency tracking by @nicolo-ribaudo in #21130
Use a gh app for making the PR to update l10n data by @calixteman in #21133
l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21134
Add code coverage support for browser/ref tests by @calixteman in #21125
Improve the "CopyLocalImage" unit-tests by @Snuffleupagus in #21131
[HCM] Set the correct color for the icon in the merge button when focused with the keyboard (bug 2033603) by @calixteman in #21135
[api-minor] Replace the CCITT and JBig2 fallback decoders with a JS version of the PDFium decoder by @Snuffleupagus in #21139
Update qcms bindings by @calixteman in #21144
Bump fast-xml-parser from 5.5.7 to 5.7.1 by @dependabot[bot] in #21140
Update quickjs bindings by @calixteman in #21148
Update the openjpeg decoder compiled with the last version of emscripten by @calixteman in #21143
Introduce a GitHub Actions workflow for running the unit tests by @timvandermeij in #21121
Avoid to add outlines having a deleted page which leads to clone a useless page (bug 2033908) by @calixteman in #21136
l10n: Update locale files by @sync-l10n-for-pdf-js[bot] in #21150
Switch to a wasm file for the quickjs sandbox by @calixteman in #21149
Prompt the user for saving a merged pdf (bug 2034461) by @calixteman in #21145
Remove the unused MIN_INT_32 constant (PR 21139 follow-up) by @Snuffleupagus in #21153
[Ink] Replace the opacity slider with an alpha-enabled color input by @calixteman in #21142
Fix status label mismatch after merging with a pre-existing selection (bug 2034111) by @calixteman in #21138
Download linked PDFs when running gulp unittestcli by @Snuffleupagus in #21147
Fix clicking on a thumbnail image not navigating to the correct page when using a screen reader (bug 2034568) by @calixteman in #21151
Enable the radix ESLint rule by @Snuffleupagus in #21157
Don't decode name of the checkboxes exported values (bug 2022700) by @calixteman in #21137
Compute a "proper" hash in the AnnotationStorage.prototype.modifiedIds getter by @Snuffleupagus in #21158
Move the hexNumbers Array into Util, to enable using it in the viewer by @Snuffleupagus in #21160
Improve unit-testing for the PDFDocumentProxy.prototype.getPageIndex method by

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