Licenses

mp3fy stands on excellent open-source software. This page credits it and links to the licenses.

In your browser (the on-device converter)

• mediabunny — media reading, decoding and MP3 muxing. MPL-2.0.
• @mediabunny/mp3-encoder(MPL-2.0), which bundles the LAMEMP3 encoder compiled to WebAssembly. LAME is licensed under theLGPL; its source is available from the LAME project.
• client-zip — streaming ZIP downloads (MIT).
• idb-keyval — IndexedDB storage (Apache-2.0).

On our servers (the cloud converter)

• FFmpeg — decoding, encoding and probing for formats browsers can’t handle. We run theBtbN GPL build server-side; FFmpeg is a trademark of Fabrice Bellard, licensed under theGPL /LGPL; source for the exact builds is available from the BtbN project.
• Hono (MIT) andaws4fetch (MIT).

The site

• Astro andSvelte — both MIT.
• Typefaces: Instrument Sans,Instrument Serif andJetBrains Mono, self-hosted under the SIL Open Font License.
• Background photographs from Unsplashunder the Unsplash License, credited on each page.

The MP3 format itself is patent-free: the last MP3 patents expired in 2017.