Convert MP3 to FLAC online in seconds — free, with no sign-up. FLAC is lossless and ideal for archiving and audiophile listening. Your files are encrypted and deleted automatically after 24 hours.
MP3
MP3 audio — The most compatible lossy audio format — small files that play on every device.
FLAC
Free Lossless Audio Codec — Open-source lossless audio that's 40–60% smaller than WAV with zero quality loss.
How to convert MP3 to FLAC
- 1Upload your MP3 file
Click “Choose a file” or drag and drop your MP3 file onto the page — no sign-up or email needed.
- 2Convert to FLAC
FLAC is already selected as the output. Open Options to fine-tune quality if you like, then click Convert.
- 3Download your FLAC file
Your FLAC file is ready in seconds — click Download to save it. Files are automatically deleted after 24 hours.
MP3 vs FLAC
| MP3 | FLAC | |
|---|---|---|
| Full name | MP3 audio | Free Lossless Audio Codec |
| Type | Audio | Audio |
| Compression | Lossy | Lossless |
| Best for | music, podcasts and sharing where compatibility matters most | archiving and audiophile listening |
Frequently asked questions
Does converting MP3 to FLAC lose quality?
Your MP3 file is already compressed, so converting to lossless FLAC can't restore detail that was discarded earlier — but it won't lose any more. The FLAC file matches your MP3 file exactly.
What's the difference between MP3 and FLAC?
MP3 audio (MP3) is lossy and best for music, podcasts and sharing where compatibility matters most. Free Lossless Audio Codec (FLAC) is lossless and best for archiving and audiophile listening. Convert MP3 to FLAC when you need a audio for archiving and audiophile listening.
Is the MP3 to FLAC converter free?
Yes — converting MP3 to FLAC is completely free. There's no watermark, no sign-up and no email required, and you can convert as many files as you like.
Are my MP3 files private and secure?
Yes. Your uploads are encrypted in transit, processed privately, and automatically deleted within 24 hours. We never share, sell or look at your files.
Can I convert MP3 to FLAC on iPhone, Android, Mac or Windows?
Yes. The converter runs entirely in your browser, so it works on any device — iPhone, iPad, Android, Mac, Windows or Linux — with nothing to download or install.
How long does it take to convert MP3 to FLAC?
Most files convert in a few seconds. Larger files take a little longer, and your upload speed is usually the limiting factor. There's no queue and no waiting for an email.
What else can I convert MP3 files to?
Besides FLAC, you can convert MP3 to AAC, AIFF, M4A, OGG, OPUS, WAV and more — see the full list of MP3 conversions below.
Other conversions
Last updated July 2026