Forma uses the following open-source components. The conversion inputs remain on your device.

FFmpeg WebAssembly core @ffmpeg/core 0.12.10 — GPL-2.0-or-later.
Unmodified upstream JavaScript and WebAssembly core (WASM is split for transport only).
Project and corresponding build/source information:
https://github.com/ffmpegwasm/ffmpeg.wasm
https://github.com/ffmpegwasm/ffmpeg.wasm-core
https://github.com/ffmpegwasm/ffmpeg.wasm/releases
Core includes FFmpeg 5.1.4 and libraries including x264, libvpx, LAME and Vorbis.
FFmpeg source: https://github.com/FFmpeg/FFmpeg/tree/n5.1.4
GNU GPL license: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html

@ffmpeg/ffmpeg — MIT: https://github.com/ffmpegwasm/ffmpeg.wasm
ImageTracer.js — Unlicense: https://github.com/jankovicsandras/imagetracerjs
gifenc — MIT: https://github.com/mattdesl/gifenc
JSZip — MIT or GPL-3.0: https://github.com/Stuk/jszip
pdf-lib — MIT: https://github.com/Hopding/pdf-lib
PDF.js — Apache-2.0: https://github.com/mozilla/pdf.js
heic2any — MIT: https://github.com/alexcorvi/heic2any
Phosphor Icons — MIT: https://github.com/phosphor-icons/web