Audio conversion uses a source-built FFmpeg 5.1.4 audio-only WebAssembly decoder and the ffmpeg.wasm wrapper. Audio stays on your computer.
Download decoder source and build scripts · Build instructions · Pinned inputs
FFmpeg LGPL 2.1 · LGPL 3 · FFmpeg license notes · Wrapper MIT notice · Emscripten notices
The source archive includes the configuration and changes used for this build. Rebuild and replace the paired ffmpeg-core.js and ffmpeg-core.wasm files under prepare-audio/vendor in a local copy of the site to use a modified decoder. Debugging modifications to these open-source components is not restricted by this notice.
The controller programming helper and linked radio application contain vendor components with separate terms. They are not relicensed by the project license. These components retain their own terms and are not covered by the project MIT license.