SoundCloud Downloader by anyo

Features:
✅ Download any SoundCloud track as an mp3
✅ Adds metadata (artwork, artist, title, composer, genre, year, description & source url)
✅ A button on every track: track page, playlists, likes, search results
✅ Works without an account, a Go+ subscription, or even being logged in
✅ Works on private tracks shared through a secret link
✅ Works whatever language your SoundCloud is set to
✅ Customizable file name format (see Preferences tab in about:addons)

How it works:
The file is built in your browser, straight from SoundCloud. Nothing goes through any other server. The add-on only asks for access to soundcloud.com and sndcdn.com (SoundCloud's CDN), and for storage to keep your filename format. No background process, ~130 KB.

SoundCloud now serves most tracks only as AAC. The add-on decodes it with your browser's own decoder and encodes it to mp3 with LAME (https://lame.sourceforge.io) compiled to WebAssembly. A box in the bottom right corner shows the progress. It takes about 2 seconds for a 4-minute track and 32 seconds for an hour-long mix (measured in Firefox on a MacBook Pro M5 Pro).

Good to know:
⚠ One track at a time: no bulk download of a playlist or album.
⚠ Since May 2026, SoundCloud locks some tracks behind DRM: no extension can download those, and the add-on says so instead of saving a broken file.
⚠ Since October 2026, SoundCloud no longer serves mp3 for most tracks and streams AAC at 160 kbps instead. The add-on encodes it to mp3 at 320 kbps to lose as little as possible in the second encoding. Tracks SoundCloud still serves as mp3 are saved as they are.

You can find the source code here: https://github.com/nyo/scdl
You can report any issues or bugs on the GitHub Issues page: https://github.com/nyo/scdl/issues

Happy digging!