High Quality MP3 to FLAC
Get the highest quality FLAC from your MP3 files. AudioUtils uses optimized encoder settings tuned for fidelity, not just speed.
Drop your MP3 file here or click to browse
MP3 (.mp3) · Max 20 MB
The converter defaults to the highest practical bitrate for FLAC. Since FLAC is lossless, every sample is preserved exactly. No encoder settings to worry about.
Garbage in, garbage out. The output quality depends on your source. A 128kbps MP3 file won't sound better in FLAC. Start with the best source available.
AudioUtils processes everything locally using WebAssembly. The encoder runs at near-native speed. A 10-minute file converts in seconds with maximum quality settings.
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.
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.