MP3 to FLAC
Convert MP3 audio to lossless FLAC. Everything runs on your device, so even large files never leave it.
From
MP3 (.mp3)
To
FLAC (.flac)
Advanced options
FLAC is lossless, so there is no bitrate to choose — the audio is stored at full quality.
- Converting to FLAC cannot restore detail that MP3 already discarded — it only stops further loss.
- Conversion uses the audio and video codecs built into your browser, so results depend on your device. Unsupported targets are greyed out.
Drop MP3 files here, or use the button below
Converted on your device — your files are never uploaded.
About these formats
- MP3 — MPEG Audio Layer III
- The universal audio format — plays on essentially every device.
- FLAC — Free Lossless Audio Codec
- Lossless compression — identical to the original at about half the size.
- Converting to FLAC cannot restore detail that MP3 already discarded — it only stops further loss.
- Conversion uses the audio and video codecs built into your browser, so results depend on your device. Unsupported targets are greyed out.
Other MP3 conversions
Private by design — no upload, no sign-up
This MP3 to FLAC converter runs locally, using your own browser. Your files are never uploaded to a server, so they stay on your device from start to finish.
- Are my MP3 files uploaded to a server?
- No. The MP3 to FLAC conversion runs locally in your browser using your own device's CPU. Your files are never uploaded, never transmitted over the network and never stored on a server.
- Is there a file size limit for MP3 to FLAC?
- There is no imposed limit, because nothing is uploaded. The practical ceiling is your device's available memory, so very large files may be slower on older hardware.
- Does it work offline?
- Yes. Once the page has loaded, converting MP3 to FLAC keeps working without a network connection, since the conversion happens entirely on your device.
- Do I need to sign up or install anything?
- No. There is no sign-up, no account and no software to install. Pick a MP3 file and convert it to FLAC straight away.
- Is converting MP3 to FLAC free?
- Yes, it is free to use, with no watermarks and no daily quota.