Convert MP3 to FLAC online
Free, no sign-up, no limits. Drop your MP3 files, get FLAC files back in seconds.
1 files converted so far
Drop your MP3 files here
or · multiple files accepted
Local conversion: your files never leave your device.
Why convert MP3 to FLAC?
Heads up: going from MP3 (compressed) to FLAC (lossless) does not restore the quality that was lost. It is useful for importing the file into editing or transcription software or a sampler that requires FLAC, not for "improving" the sound.
How to do it, step by step
- Drop your MP3 fileinto the area at the top of the page (or several files at once). On mobile, tap the area and pick the file from your apps.
- Check the output format: FLAC is already selected. FLAC is a lossless format: there is no quality setting, the sound is reproduced identically. The file will be noticeably larger than a compressed format.
- Start the conversion.The FFmpeg engine loads once (≈ 10 MB), then each file is processed in a few seconds without leaving your device.
- Download your FLAC, directly or as a .zip if you converted several files. The name and metadata (title, artist, cover art) are preserved.
The MP3 format (MPEG-1/2 Audio Layer III)
MP3 is the most universal audio format in the world. It plays on absolutely everything: car stereos, phones, TVs, game consoles, MP3 players, browsers, editing software. Its compression is slightly less efficient than AAC, but its total compatibility makes it the safe choice for sharing an audio file.
- Compatible with 100% of devices
- Small file size
- Patent-free since 2017
- Less efficient compression than AAC/Opus
- Irreversible quality loss at low bitrates
The FLAC format (Free Lossless Audio Codec)
FLAC compresses audio with zero loss: the file is 40 to 60% the size of the original WAV but reproduces exactly the same sound. It is the format of choice for audiophiles and music archives. It is free, open, and supports metadata and cover art.
- Quality identical to the original
- Free and open format
- Supports tags and cover art
- Files 5 to 10 times larger than an MP3
- Not played by Apple devices without a third-party app
MP3 vs FLAC comparison
| MP3 | FLAC | |
|---|---|---|
| Compression | Lossy | Lossless |
| Typical size (1 min, music) | ≈ 1.4 MB (192k) | ≈ 5 MB |
| Common use | podcasts, music, car stereos, portable players, email attachments | CD archiving, audiophiles, Bandcamp, Qobuz |
| Metadata (title, cover art) | Yes | Yes |
Frequently asked questions
Does converting MP3 to FLAC lose quality?
No: FLAC is a lossless format. The sound of the converted file is strictly identical to that of the original MP3, but the quality already lost during MP3 compression is not recovered.
Is the MP3 to FLAC converter free?
Yes, with no limit on the number of files, no sign-up and no watermark. Each file can be up to 200 MB.
Are my MP3 files uploaded to the internet?
No. The MP3 to FLAC conversion is performed by FFmpeg directly in your browser (WebAssembly). Your files never leave your computer or phone.
How do I convert MP3 to FLAC on iPhone or Android?
Open this page in Safari or Chrome, tap the drop area, select your MP3 file (from Files, Voice Memos, Downloads or WhatsApp), then tap "Convert". The FLAC downloads to your files.
Can I convert several MP3 files at once?
Yes, add all your files in one go. They are converted one after another and a button lets you download everything as a .zip archive.