Sonify

Sonify converts individual YouTube videos that users own or have permission to convert into MP3 audio. It needs no account or installation. Current limits are 30 minutes per video and five conversions per hour. Choose 128, 256, or 320 kbps, then save the result within a 15-minute download window. Temporary files can be deleted manually. Built for occasional authorized audio tasks; it does not offer playlists, transcription, or permanent audio storage.