Honest comparison
AudioFetcher vs 4K YouTube to MP3
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.
Written by the AudioFetcher team, so we have an interest. Facts about 4K YouTube to MP3 come from its own site, documentation or linked sources. Last checked September 17, 2026.
Side by side
| AudioFetcher | 4K YouTube to MP3 | |
|---|---|---|
| Platform | Web app in any modern browser; optional Firefox extension | Desktop app for Windows, macOS and Ubuntu; separate Android app |
| Install | None | Yes |
| Account | Not needed for free conversions | Not required; signing in to YouTube is optional and unlocks some content |
| Price | Free for single videos up to 60 minutes. Supporter Pass: $5 one-time for 30 days, no subscription. | Free Starter plan; Lite $10/year with ads; Personal $15 one-time; Pro $45 one-time (listed as a discount from $60) |
| Ads and pop-ups | None | The Lite plan is listed with ads; the Personal and Pro plans are ad-free |
| Output formats | MP3 (up to 320 kbps, VBR options), FLAC, original Opus, original M4A, MP4 (up to 720p free) | MP3, M4A and OGG; a "High Quality Audio" option on Pro |
| Keeps original YouTube audio | Yes, Opus and M4A are delivered without re-encoding | Not stated on the product page |
| Length limits | Free: 60 minutes of audio per video, one MP4 per day up to 20 minutes. Supporter: audio up to 12 hours, FLAC up to 2 hours, MP4 up to 60 minutes | Not published |
| Playlists | Full playlists and queues of up to 100 links with a Supporter Pass; a free Library Pack of up to 10 items once a day | Unlimited playlists and channels on paid plans |
| Extras | ID3 tag editing and embedded cover art (MP3), chapter embedding and splitting, SponsorBlock sponsor removal, subtitles, LRCLIB lyrics file, ordered playlist ZIP | Downloads from several sites; no FLAC, chapter or SponsorBlock features listed |
| Checks before converting | One Cloudflare Turnstile check before a free conversion | For "not a bot" errors, 4K's help suggests signing in, using a VPN, or waiting |
| Where conversion runs | On AudioFetcher's servers; files are temporary and deleted automatically | On your own computer |
About the free plan
4K does not publish the free plan's daily limit on its own site. Third-party reviews mention a limit, but we could not verify the number, so we do not state one. Check the app itself before you decide.
Choose 4K YouTube to MP3 if
- You download playlists regularly and prefer a one-time purchase to a subscription.
- You want a desktop app that runs downloads on your own machine.
Choose AudioFetcher if
- You do not want to install software, or you are on a phone or a managed computer.
- You want FLAC, the original Opus stream, chapters split into tracks, or sponsor segments removed.
- You convert single videos occasionally and the free tier covers you.
Other comparisons
Sources
- 4K YouTube to MP3 product pagePlatforms, formats, version.
- 4K YouTube to MP3 pricingStarter, Lite, Personal and Pro plans.
- 4K sign-in FAQWhy signing in to YouTube is offered.
- 4K troubleshootingSuggested fixes for bot-check errors.
Other tools change often. If something here is out of date, email help@audiofetcher.com and we will correct it.