Bundled engines, loaded locally from this site:

pdf-lib 1.17.1 — MIT. License: pdf-lib-LICENSE.md
Source: https://github.com/Hopding/pdf-lib/tree/v1.17.1

@ffmpeg/ffmpeg 0.12.15 — MIT wrapper.
Source: https://github.com/ffmpegwasm/ffmpeg.wasm

@ffmpeg/core 0.12.10 — FFmpeg WebAssembly build; GPL-2.0-or-later and the licenses of its bundled libraries apply.
Corresponding build project and source dependencies: https://github.com/ffmpegwasm/ffmpeg.wasm
FFmpeg source and licensing: https://ffmpeg.org/legal.html
The compressed wasm is byte-for-byte the npm release after decompression.
No third-party processing endpoint receives user files.