Convert MP3 to FLAC — Free & Private
Convert MP3 to FLAC online for free. MP3 is the most widely-supported lossy audio format; FLAC is a lossless audio format that preserves full quality. All processing happens locally in your browser — your files never leave your device.
How to convert MP3 to FLAC
- 1
Select your MP3 file
Click or drag your MP3 file onto the converter above.
- 2
Convert to FLAC
The output format is pre-set to FLAC. Click the convert button to process your file.
- 3
Save instantly
Your converted FLAC file is ready — save it to your device, no email required.
MP3 to FLAC — FAQ
Is the MP3 to FLAC converter really free?
Yes, completely free. No hidden fees, no watermarks, no file size limits. LocalConvert is open source and free forever.
Are my MP3 files safe?
Absolutely. Your files never leave your browser. All MP3 to FLAC conversion happens using WebAssembly running locally on your device — no uploads, ever.
How long does MP3 to FLAC conversion take?
Most conversions finish in seconds. Larger files may take a little longer depending on your device's speed and memory.
What's the difference between MP3 and FLAC?
MP3 is the most widely-supported lossy audio format. FLAC is a lossless audio format that preserves full quality.