This project uses @ffmpeg/ffmpeg (MIT), @ffmpeg/util (MIT), and @ffmpeg/core (GPL-2.0-or-later). The FFmpeg core is loaded from the jsDelivr CDN at a pinned version, 0.12.10, when conversion begins.
Upstream source code, attribution and license information are available via ffmpeg.wasm on GitHub and FFmpeg legal information.
The MP3 Tag Editor also uses browser-id3-writer (MIT) and jsmediatags (BSD-3-Clause). License and attribution notices for their authors must be preserved when distributing the software. The project must complete commercial license-compliance review before monetizing or independently distributing the conversion engine.