MP3 to FLAC converter
Free MP3 to FLAC converter that runs in your browser. Convert MP3 audio to FLAC instantly — no upload, no sign-up, 100% private.
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Convert MP3 audio to FLAC right in your browser — no upload, no sign-up, completely free. Drop a file (or a batch) and download the FLAC version in seconds. Your audio is processed on your own device and never sent to a server.
MP3 is the most universally compatible audio format. It uses lossy compression to make small files that play on virtually any device, app or website. FLAC is a lossless format that compresses audio with no loss of quality — typically to about half the size of WAV. It is the favourite of audiophiles for archiving music. Note that converting a compressed MP3 file to lossless FLAC can’t restore detail the original MP3 compression already discarded — it gives you an uncompressed copy, handy for editing.
How to convert MP3 to FLAC
- Add your MP3 files. Drag your MP3 audio onto the drop zone or click to browse. You can add several at once.
- Convert. Each track is re-encoded to FLAC on your device using your browser’s native audio engine.
- Download your FLAC files. Save each file, or grab them all together as a ZIP.
Features
- Private by default. Audio is converted in your browser and never uploaded to any server.
- Batch conversion. Convert many MP3 files to FLAC at once and download them as a ZIP.
- Lossless output. FLAC keeps the audio lossless.
- Free and unlimited. No watermark, no sign-up, no per-file limits.
When to use it
- Convert MP3 to FLAC for a device or app that doesn’t play MP3.
- Make MP3 files smaller and easier to share by converting to FLAC.
- Prepare audio for lossless music archiving at roughly half the size of WAV.
- Batch-convert a folder of MP3 files to FLAC in one go.
Frequently asked questions
Is this MP3 to FLAC converter free?
Yes. It’s completely free with no sign-up, no watermark and no limit on how many files you convert.
Are my files uploaded to a server?
No. Conversion runs entirely in your browser, so your MP3 audio never leaves your device.
Will the audio quality change?
Note that converting a compressed MP3 file to lossless FLAC can’t restore detail the original MP3 compression already discarded — it gives you an uncompressed copy, handy for editing.
What’s the difference between MP3 and FLAC?
MP3 is the most universally compatible audio format. It uses lossy compression to make small files that play on virtually any device, app or website. FLAC is a lossless format that compresses audio with no loss of quality — typically to about half the size of WAV. It is the favourite of audiophiles for archiving music.
Can I convert several MP3 files at once?
Yes. Drop multiple files to convert them as a batch, then download everything as a single ZIP.