How AudioFetcher compares with other YouTube audio tools

Both are ad-free web tools with no account. cobalt is open source, supports many sites and can be self-hosted. AudioFetcher focuses on YouTube audio and adds playlists, original Opus and M4A, FLAC, chapters, SponsorBlock and tag editing. cobalt's maintainers have reported that YouTube limits restrict downloads on the public cobalt.tools instance since mid-2025.

Both are ad-free, browser-based and free for single videos, and CnvMP3 has an excellent Trustpilot rating. CnvMP3 allows longer free MP3s (90 minutes against AudioFetcher's 60) and supports several other video sites. AudioFetcher adds original Opus and M4A without re-encoding, FLAC, playlists, chapters, SponsorBlock and MP3 tag editing.

yt-dlp is free, open source and more capable than any web converter, including AudioFetcher. It needs an install, ffmpeg, a JavaScript runtime for YouTube since late 2025, and regular updates. AudioFetcher itself uses yt-dlp and ffmpeg on its own servers, so you get original audio, FLAC, playlists, chapters, SponsorBlock and tags from a web page instead of a terminal.

4K YouTube to MP3 is a desktop app with one-time licences and unlimited playlists on paid plans. AudioFetcher is a web converter with no install, a free tier for single videos, and extras such as FLAC, original Opus, chapters and SponsorBlock that 4K's app does not list.