MP3 to FLAC
Convert MP3 to FLAC online, free — right in your browser. Nothing is uploaded.
Everything ran in your browser — nothing was uploaded.
How to use the MP3 to FLAC
- Drop in your MP3 file (or any audio file).
- The output is already set to FLAC — pick a bitrate if you like.
- Click Convert and download your FLAC file.
About the MP3 to FLAC
MP3 to FLAC converts MP3 audio into FLAC, right in your browser. MP3 is the most universal audio format — it plays on virtually every phone, car stereo, browser and app, which is why it is still the safest choice for sharing. FLAC is lossless but compressed, giving you the full original quality at roughly half the size of WAV — the favourite of audiophiles.
Converting MP3 to FLAC gives you a compact, lossless copy for archiving or high-quality listening. Note that converting a compressed file to a lossless one does not restore lost quality — it simply stores the same audio uncompressed, which is what editing software expects. Everything runs on your device with a WebAssembly build of ffmpeg, so your file is never uploaded — it is private, free and has no watermark. The audio engine is downloaded once (shared with the other audio and video tools) and then cached, so repeat conversions start quickly.
Frequently asked questions
Is my MP3 file uploaded?
No. The conversion runs entirely in your browser with ffmpeg (WebAssembly). Your file never leaves your device.
Will I lose quality converting MP3 to FLAC?
Note that converting a compressed file to a lossless one does not restore lost quality — it simply stores the same audio uncompressed, which is what editing software expects.
What bitrate should I choose?
For FLAC, 192 kbps is a good balance and 320 kbps is near-transparent. Lossless targets (WAV, FLAC, AIFF) ignore bitrate and keep full quality.
Can I convert more than one file?
Convert them one after another — each stays private on your own device, with nothing uploaded.