Licenses & source code

The conversions on this site run in your browser using FFmpeg, compiled to WebAssembly by the ffmpeg.wasm project. We thank both projects.

FFmpeg (via ffmpeg.wasm)

• Conversion engine: @ffmpeg/core 0.12.10, which contains FFmpeg 5.1.4 with the LAME MP3 encoder.
• License: GNU General Public License, version 2 or later (GPL-2.0-or-later).
• Source code of this exact build: ffmpeg.wasm v0.12.10 (build scripts) and FFmpeg 5.1.4.
• Controller library: @ffmpeg/ffmpeg 0.12.15 (MIT), from the same ffmpeg.wasm repository.

We distribute these files unmodified. If you'd like a copy of the corresponding source code from us, contact us and we'll send it.

Other libraries

• fflate 0.8.2 (MIT) — creates ZIP files in your browser.
• Astro (MIT) — builds this website.
• Fonts: Fraunces and Geist (SIL Open Font License 1.1).