mime2extension
A Flutter package for converting between MIME types and file extensions with wildcard support and base64 file type detection via magic bytes.
0.0.5
3.0K downloads/mo
#4649 most downloaded on pub.dev
tidu090/mime2extension
What this package is like to depend on
Last release 5 months ago
10 Mar 2026
Too new to tell
only 2 release windows
Nearly every release is documented
notes for 5 of 5 stable releases
Nothing withdrawn
no release was ever pulled
9 months old
5 releases · first in 2025
5 releases in the last 12 months
see the full history below
Release timeline
5 releases · Nov 2025 to Mar 2026
2026
Releases
latest 5-
0.0.510 Mar 2026Release notes
Open source →Added
- OLE2 Compound Binary Format sub-format detection — differentiates DOC, XLS, PPT by scanning for UTF-16LE directory entry stream names (Workbook, Book, PowerPoint Document, WordDocument)
- 10 new unit tests for OLE2 detection (total: 66 tests)
-
0.0.410 Mar 2026Release notes
Open source →Added
base64ToExtension(String base64Data)— detect file extension from base64-encoded data using magic bytesbase64ToMime(String base64Data)— detect MIME type from base64-encoded data- Magic bytes database with 400+ file signatures covering images, audio, video, documents, archives, fonts, executables, and more
- Smart RIFF container detection — differentiates WEBP, AVI, WAV, CDA, QCP, RMI, ANI, CMX, CDR
- Smart ISO BMFF (ftyp) container detection — differentiates MP4, MOV, HEIC, AVIF, M4A, M4V, 3GP, 3G2, HEIF
- Automatic data URI prefix stripping (
data:...;base64,handled transparently) - 42 new unit tests for base64 detection (total: 56 tests)
- Missing common file signatures: WASM, JPEG XL, RAR5, ZSTD, LZ4
-
0.0.320 Nov 2025 -
0.0.220 Nov 2025Release notes
Open source →Changed
- Updated LICENSE to BSD-3-Clause (Flutter Authors)
- Added repository and homepage URLs to pubspec.yaml
- Updated GitHub repository references
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0.0.120 Nov 2025Release notes
Open source →Added
- Initial release of mime2extension package
extension2Mime(String extension)function to convert file extensions to MIME typesmime2Extension(List<String> mimeTypes)function to convert MIME types to file extensions- Wildcard support for MIME type queries (e.g.,
application/*returns all application extensions) - Comprehensive MIME type database with 6000+ entries from IANA, Apache, and nginx sources
- Support for all major file categories:
- Application types (836 extensions)
- Image types (png, jpg, gif, svg, etc.)
- Audio types (mp3, wav, ogg, etc.)
- Video types (mp4, avi, mkv, etc.)
- Text types (txt, html, css, etc.)
- Font types (ttf, otf, woff, etc.)
- Automatic duplicate removal in results
- Null-safe API with proper error handling
- Comprehensive unit test suite (14 tests)
- Example file demonstrating all features
- Full documentation with usage examples
Features
- Zero external dependencies (Flutter SDK only)
- Type-safe implementation
- Efficient lookup using Map data structures
- Support for multiple MIME types in a single query
- Combines exact matches and wildcard patterns