Sonify

Sonify is a free browser tool for converting individual YouTube videos that users own or have permission to convert into MP3 audio. No account or installation is needed.

Current limits: 30 minutes per video, five conversions per hour, 128/256/320 kbps output, and a 15-minute download window with manual deletion. Save the MP3 locally before the window expires.

It serves occasional authorized audio tasks and does not offer playlists, transcription, or a permanent audio library. Output bitrate cannot restore detail missing from the source.