Convert MP3 to FLAC Free
Convert MP3 to FLAC without paying a cent. No trial period. No account required. Just open the page and convert.
Drop your MP3 file here or click to browse
MP3 (.mp3) · Max 20 MB
Most free converters add watermarks or throttle quality. AudioUtils does neither. You get the same output quality whether free or paid.
Free users get 5 conversions per month with a 10-second preview output. The conversion engine is identical to Pro — same speed, same quality, same privacy. Upgrade for full-length output.
Your files stay on your machine. Nothing is uploaded. MP3 is lossy. Converting to FLAC won't restore lost data, but gives you an uncompressed container for editing workflows.
Frequently Asked Questions
Does converting MP3 to FLAC make it lossless?
No. The audio quality remains identical to the source MP3. FLAC is the container format, but the audio data inside was already compressed with loss. For true lossless quality, start with an uncompressed source like CD audio or WAV.
Will the FLAC file be larger than the MP3?
Yes, somewhat. FLAC wraps the decoded audio in lossless compression, so the file will be larger than the MP3 but smaller than the equivalent WAV.
When does MP3 to FLAC conversion make sense?
When you need FLAC format for compatibility reasons — certain audio players, home theater systems, or archival workflows that require FLAC input.
What's the best source for FLAC files?
Rip from CDs, buy from services like Bandcamp or Qobuz, or convert from WAV/AIFF masters. Starting with a lossless source ensures true FLAC quality.
Will the FLAC play on my hi-fi streamer or DAC?
Most modern network players and DACs (Naim, Cambridge Audio, Bluesound, Roon) natively support FLAC. If your device rejects MP3 but accepts FLAC, this conversion solves it. The audio quality will be identical to the source MP3 — FLAC is just the delivery container.
Are my files uploaded to a server?
No. Everything runs in your browser using FFmpeg compiled to WebAssembly. Your MP3 never leaves your device.
About MP3
The most widely used audio format. Great compatibility, small file size. Ideal for music, podcasts, and general use.
About FLAC
Lossless compression. Perfect quality at roughly half the size of WAV. The choice for audiophiles and archiving.