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npm · #3228 most downloaded on npm
Stringify your JSON at max speed
Last release 2 months ago
09 Jul 2026
Release timing varies
gaps range from 2 weeks to 8 months
Nearly every release is documented
notes for 59 of the last 60 stable releases
Nothing withdrawn
no release was ever pulled
10 years old
168 releases · first in 2016
chore: update depedabot setting by @climba03003 in https://github.com/fastify/fast-json-stringify/pull/843
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v7.0.0...v7.0.1
chore(types): remove deprecated debugMode option by @Tony133 in https://github.com/fastify/fast-json-stringify/pull/840
One column per quarter.
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v6.4.0...v7.0.0
test: improve test coverage (~1%) by @nigrosimone in https://github.com/fastify/fast-json-stringify/pull/822
json-add-comma.test.js by @LiviaMedeiros in https://github.com/fastify/fast-json-stringify/pull/830Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v6.3.0...v6.4.0
chore: remove RunKit (is dead) by @cesco69 in https://github.com/fastify/fast-json-stringify/pull/815
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v6.2.0...v6.3.0
docs: remove flatstr suggestion by @cesco69 in https://github.com/fastify/fast-json-stringify/pull/796
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v6.1.1...v6.2.0
Revert of escaping change by @mcollina in https://github.com/fastify/fast-json-stringify/pull/797
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v6.1.0...v6.1.1
perf: Cache obj[key] access into (missed property from PR 707) by @cesco69 in https://github.com/fastify/fast-json-stringify/pull/759
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v6.0.1...v6.1.0
remove unused dependency by @gurgunday in https://github.com/fastify/fast-json-stringify/pull/727
var statements by @Fdawgs in https://github.com/fastify/fast-json-stringify/pull/742Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v6.0.0...v6.0.1
Update for fastify@5 by @jsumners in https://github.com/fastify/fast-json-stringify/pull/726
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.16.1...v6.0.0
Resolved Cannot convert a BigInt value to a number by @camillo-positano in https://github.com/fastify/fast-json-stringify/pull/723
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.16.0...v5.16.1
Avoid loading validator un-necessarily by @brettwillis in https://github.com/fastify/fast-json-stringify/pull/718
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.15.1...v5.16.0
fix: escape single quote when building error message for required property by @tomastauer in https://github.com/fastify/fast-json-stringify/pull/716
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.15.0...v5.15.1
Performance: Cache obj[key] access into by @cesco69 in https://github.com/fastify/fast-json-stringify/pull/707
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.14.1...v5.15.0
Fix allOf with $ref property by @mcollina in https://github.com/fastify/fast-json-stringify/pull/705
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.14.0...v5.14.1
perf: fast regex check on string by @cesco69 in https://github.com/fastify/fast-json-stringify/pull/696
" and \ (micro-optimization) by @cesco69 in https://github.com/fastify/fast-json-stringify/pull/695NaN (micro-optimization) by @cesco69 in https://github.com/fastify/fast-json-stringify/pull/697Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.13.0...v5.14.0
chore(.gitignore): add .tap/ dir by @Fdawgs in https://github.com/fastify/fast-json-stringify/pull/678
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.12.0...v5.13.0
fix: merged schemas caching by @ivan-tymoshenko in https://github.com/fastify/fast-json-stringify/pull/677
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.11.1...v5.12.0
Reverts all changes introduced in v5.11.1.
Reverts all changes introduced in v5.11.1.
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.11.0...v5.11.1
build(deps-dev): bump tsd from 0.29.0 to 0.30.3 by @dependabot in https://github.com/fastify/fast-json-stringify/pull/672
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.10.0...v5.11.0
fix: non-nullable schema receiving null input does not coerce for default types on object and arrays by @rhighs in https://github.com/fastify/fast-jso
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.9.2...v5.10.0
feat: replace uuid with prefixed string with schemaIdCounter by @Uzlopak in https://github.com/fastify/fast-json-stringify/pull/661
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.9.1...v5.9.2
Revert "perf: use node: prefix to bypass require.cache call for builtins (#644)" by @mcollina in https://github.com/fastify/fast-json-stringify/pull/6
node: prefix to bypass require.cache call for builtins (#644)" by @mcollina in https://github.com/fastify/fast-json-stringify/pull/660Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.9.0...v5.9.1
build(deps-dev): bump @sinclair/typebox from 0.29.6 to 0.30.4 by @dependabot in https://github.com/fastify/fast-json-stringify/pull/638
node: prefix to bypass require.cache call for builtins by @Fdawgs in https://github.com/fastify/fast-json-stringify/pull/644.gitattributes file by @Fdawgs in https://github.com/fastify/fast-json-stringify/pull/649use strict directive by @Fdawgs in https://github.com/fastify/fast-json-stringify/pull/652' character by @seidelmartin in https://github.com/fastify/fast-json-stringify/pull/658Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.8.0...v5.9.0
build(deps-dev): bump @sinclair/typebox from 0.26.8 to 0.27.1 by @dependabot in https://github.com/fastify/fast-json-stringify/pull/620
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.7.0...v5.8.0
avoid implicit conversion of null in serializer by @Uzlopak in https://github.com/fastify/fast-json-stringify/pull/609
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.6.2...v5.7.0
use Number.isInteger instead of bitwise operation by @Uzlopak in https://github.com/fastify/fast-json-stringify/pull/606
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.6.1...v5.6.2
Fix 604 by @mcollina in https://github.com/fastify/fast-json-stringify/pull/605
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.6.0...v5.6.1
build(deps-dev): bump tsd from 0.24.1 to 0.25.0 by @dependabot in https://github.com/fastify/fast-json-stringify/pull/565
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.5.0...v5.6.0
fast-json-stringify is not a validator by @mcollina in https://github.com/fastify/fast-json-stringify/pull/558
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.4.1...v5.5.0
perf: use regexp in string escaping by @ivan-tymoshenko in https://github.com/fastify/fast-json-stringify/pull/553
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.4.0...v5.4.1
fix: apply if/then/else check for any schema by @ivan-tymoshenko in https://github.com/fastify/fast-json-stringify/pull/533
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.3.0...v5.4.0
refactor: remove array items schema cloning by @ivan-tymoshenko in https://github.com/fastify/fast-json-stringify/pull/518
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.2.0...v5.3.0
build(deps-dev): bump luxon from 2.5.0 to 3.0.1 by @dependabot in https://github.com/fastify/fast-json-stringify/pull/490
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.1.0...v5.2.0
perf: replace deepmerge npm-package with @fastify/deepmerge by @Uzlopak in https://github.com/fastify/fast-json-stringify/pull/483
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.0.6...v5.1.0
build(deps-dev): bump @sinclair/typebox from 0.23.5 to 0.24.9 by @dependabot in https://github.com/fastify/fast-json-stringify/pull/486
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.0.5...v5.0.6
fix: reset json pointer in merged allOf schema by @ivan-tymoshenko in https://github.com/fastify/fast-json-stringify/pull/482
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.0.4...v5.0.5
fix: reference after merge allOf by @Eomm in https://github.com/fastify/fast-json-stringify/pull/480
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.0.3...v5.0.4
serializer.js - asNumber(), asInteger() by @yaki3355 in https://github.com/fastify/fast-json-stringify/pull/478
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.0.2...v5.0.3
fix: remove nested if/then duplicate serialization by @ivan-tymoshenko in https://github.com/fastify/fast-json-stringify/pull/471
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.0.1...v5.0.2
fix: input schemas mutation by @ivan-tymoshenko in https://github.com/fastify/fast-json-stringify/pull/470
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v5.0.0...v5.0.1
chore(package): remove engines field by @Fdawgs in https://github.com/fastify/fast-json-stringify/pull/463
engines field by @Fdawgs in https://github.com/fastify/fast-json-stringify/pull/463Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v4.2.0...v5.0.0
fix: standalone ajv schema by @climba03003 in https://github.com/fastify/fast-json-stringify/pull/461
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v4.1.0...v4.2.0
refactor: save additional functions in context array by @ivan-tymoshenko in https://github.com/fastify/fast-json-stringify/pull/455
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v4.0.0...v4.1.0
ci: migrate to fastify reusable workflow by @Fdawgs in https://github.com/fastify/fast-json-stringify/pull/415
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v3.2.0...v4.0.0
build(deps): bump actions/checkout from 2 to 3 by @dependabot in https://github.com/fastify/fast-json-stringify/pull/400
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v3.1.0...v3.2.0
chore: unnecessary stringify calls by @Eomm in https://github.com/fastify/fast-json-stringify/pull/383
pull_request_target by @Fdawgs in https://github.com/fastify/fast-json-stringify/pull/404Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v3.0.2...v3.1.0
Nothing published for this version
Use ajv.addSchema to load validation schemas at build by @MSE99 in https://github.com/fastify/fast-json-stringify/pull/382
ajv.addSchema to load validation schemas at build by @MSE99 in https://github.com/fastify/fast-json-stringify/pull/382Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v3.0.1...v3.0.2
chore: add oneOf to docs by @Eomm in https://github.com/fastify/fast-json-stringify/pull/377
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v3.0.0...v3.0.1
Update to ajv version 7.2.3 by @MSE99 in https://github.com/fastify/fast-json-stringify/pull/307
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v2.7.13...v3.0.0
Bump fastify/github-action-merge-dependabot from 2.5.0 to 2.6.0 by @dependabot in https://github.com/fastify/fast-json-stringify/pull/367
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v2.7.12...v2.7.13
Add support for recursive references in object types by @simonsinclair in https://github.com/fastify/fast-json-stringify/pull/366
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v2.7.11...v2.7.12
chore: add benchmark setup by @RafaelGSS in https://github.com/fastify/fast-json-stringify/pull/360
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v2.7.10...v2.7.11
perf: speed up date formatting by 555x by @kevcodez in https://github.com/fastify/fast-json-stringify/pull/357
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v2.7.9...v2.7.10
Bump actions/setup-node from 2.3.0 to 2.3.1 by @dependabot in https://github.com/fastify/fast-json-stringify/pull/345
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v2.7.8...v2.7.9
Bump actions/setup-node from 2.1.5 to 2.2.0 by @dependabot in https://github.com/fastify/fast-json-stringify/pull/340
Full Changelog: https://github.com/fastify/fast-json-stringify/compare/v2.7.7...v2.7.8
Bump fastify/github-action-merge-dependabot from 2.1.0 to 2.1.1
📚 PR:
Bump fastify/github-action-merge-dependabot from 2.0.0 to 2.1.0
📚 PR:
📚 PR: - fix round internal integer
📚 PR:
Bump actions/checkout from 2 to 2.3.4
📚 PR:
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