Turn your MP3 audio files into FLAC in seconds — free, private and entirely in your browser. Nothing is ever uploaded to a server.
Open the Audio Converter
Go to the DefyAudio Studio — the MP3 to FLAC converter runs right in your browser.
Add your MP3 file(s)
Drag and drop or browse for your MP3 file. Add several at once to batch-convert them all to FLAC.
Choose FLAC as the output
Select FLAC in the Format tab. FLAC is lossless, so you keep full quality.
Adjust quality (optional)
Fine-tune sample rate, channels and bit depth if you need a specific spec — otherwise the defaults are ready to go.
Convert and download
Click Convert. Your FLAC file is processed locally and downloads instantly — no data leaves your device.
Converting MP3 to FLAC wraps your audio in a lossless container that won't degrade further when you archive or re-edit it. FLAC also stays smaller than WAV thanks to lossless compression — a good archival choice, though it can't rebuild detail the original MP3 encoding removed.
Open DefyAudio's converter, add your MP3 file, select FLAC as the output format, and click Convert. The FLAC file downloads instantly — free, with no upload.
FLAC is a lossless format, so no quality is lost in the container. Note that if the MP3 source was already lossy, converting to FLAC cannot recover detail that was never there.
No. All conversion happens locally in your browser — your files never leave your device.
Yes. Add multiple MP3 files and DefyAudio batch-converts them all to FLAC in one pass.