Licenses and third-party software

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Privacy

Your video, audio and subtitle files are opened and processed inside your browser only. They are never uploaded. The page makes no analytics, advertising or tracking requests. The web server that hosts this page may keep ordinary access logs (for example your IP address and the page requested), as any web server does.

FFmpeg (audio conversion) - GPL-2.0-or-later

When you press "Convert to playable audio", this page loads FFmpeg compiled to WebAssembly (vendor/ffmpeg/core/ffmpeg-core.wasm). It is loaded only on that action, from this same server, and only reads audio from your own file to produce an AAC file on your device.

• Program: FFmpeg 5.1.x (libavformat 59.27.100), built with --enable-gpl, packaged as npm @ffmpeg/core 0.12.10, used unmodified.
• License: GNU General Public License, version 2 (or, at your option, any later version). FFmpeg is Copyright (c) the FFmpeg developers; it also contains libx264, libx265, libvpx, libmp3lame, libass, libopus, libtheora, libvorbis, libwebp, libfreetype and libfribidi under their own licenses.
• This program comes with no warranty, to the extent permitted by law.
• Corresponding source code:
  • FFmpeg: https://ffmpeg.org/releases/ (the 5.1 series) and https://github.com/FFmpeg/FFmpeg
  • WebAssembly build recipe and patches: https://github.com/ffmpegwasm/ffmpeg.wasm (release v0.12.10, package @ffmpeg/core@0.12.10)
  • Package contents: https://www.npmjs.com/package/@ffmpeg/core/v/0.12.10
  If you cannot get the source from these places, ask the operator of this site; the operator must provide it on request.
• You may replace the bundled engine with your own build of the same source: the files are plain static files in vendor/ffmpeg/.

FFmpeg JavaScript wrapper - MIT

vendor/ffmpeg/wrapper: npm @ffmpeg/ffmpeg 0.12.15, Copyright (c) 2019 Jerome Wu. See the MIT license text.

Codecs and patents

Some audio and video formats (for example AAC, AC-3, DTS, H.264, HEVC) are covered by patents in some countries. Playing video uses the codecs of your own browser or operating system. This site does not provide a patent license; if you use the conversion feature commercially, check the rules that apply to you.