Licenses
Open-source licenses
FixMyFiles stands on excellent open-source work. These are the libraries that run in your browser when you use the tools, with what each one does and the license it is published under.
Updated September 17, 2026
| Library | What it does here | License |
|---|---|---|
| FFmpeg (ffmpeg.wasm core 0.12.10) | Older video and audio formats, GIF making, PSD, DDS, EXR and JPEG 2000 decoding Built with x264, x265, libvpx, LAME, Opus, Vorbis and Theora, among others. Distributed unmodified. | GPL-2.0-or-later |
| @ffmpeg/ffmpeg and @ffmpeg/util | Running FFmpeg in a background worker | MIT |
| Mediabunny | Reading and writing MP4, MOV, WebM, MKV and audio files with your device’s own codecs | MPL-2.0 |
| Mediabunny AAC, MP3 and FLAC encoders | Audio encoding where the browser has no built-in encoder | MPL-2.0 |
| jSquash (AVIF, WebP, JPEG) | Image encoding with libavif, libwebp and MozJPEG | Apache-2.0 |
| heic-to | Decoding iPhone HEIC photos with libheif | LGPL-3.0 |
| UTIF.js | Reading and writing TIFF | MIT |
| UPNG.js | Writing animated PNG | MIT |
| gifenc | Writing animated GIF | MIT |
| ImageTracer.js | Tracing pictures into SVG shapes | Unlicense (public domain) |
| exifr | Reading photo metadata and orientation | MIT |
| fflate | Making “Save all as ZIP” archives | MIT |
| Astro and Tailwind CSS | Building the website | MIT |
Source code for GPL and LGPL components
FFmpeg (GPL-2.0-or-later) and libheif (LGPL-3.0) are shipped as the unmodified builds published by the projects linked above, where their complete source code is available. If you would like us to send you the corresponding source for the exact versions we distribute, email [email protected] and we will provide it, free of charge, for at least three years from the date the version was last served.
Trademarks
Format and product names such as HEIC, MP4, WebP, Gmail and WhatsApp belong to their owners and are used only to describe compatibility.