Convert MP3 to FLAC online — free
Need your MP3 in a lossless container for archiving or specific software? Convert instantly. No app, no signup, no watermark.
- No watermarks
- Works on mobile
- First fix free, no signup
FixTheFile AI Studio- 1Upload
- 2Pick a fix
- 3Download
- 1Upload
- 2Pick a fix
- 3Download
Drop any file. AI picks the fix.
Images, audio, video, PDF, Word and ZIP — up to 500MB. Or click anywhere to browse.
image → upscale · audio → clean noise · video → extract audio · pdf → text · zip → repair
How it works
How to convert MP3 to FLAC online
Upload your MP3 file
Drag and drop your MP3 audio file — any standard MP3 file works.
Select "Convert format" → FLAC
FixTheFile converts your MP3 to FLAC in seconds.
Download your FLAC
Your converted file downloads directly — no email, no account needed.
Why FixTheFile
The easiest MP3 to FLAC converter
No watermark
Your converted FLAC is clean, no branding added
No signup needed
Convert instantly, no account or email required
Lossless container
No further quality is lost in the conversion itself
Works on any device
Browser-based, no app to install on Mac, Windows, or Android
Private and secure
Files not stored permanently, never shared
Also converts to WAV
Not just FLAC, pick any audio format you need
How do I convert MP3 to FLAC online for free?+
Upload your MP3 file to FixTheFile, choose "Convert format", and select FLAC as the output. Your converted file downloads instantly — no signup required.
What is the difference between MP3 and FLAC?+
MP3 is a compressed, lossy format, while FLAC is a lossless format that preserves more audio detail without compression artifacts.
Will converting MP3 to FLAC improve the sound quality?+
No — converting MP3 to FLAC cannot restore quality that was already lost when the file was originally compressed to MP3. It simply repackages the existing audio in a lossless container.
Why convert MP3 to FLAC at all then?+
Some software, archiving workflows, or audio equipment require or prefer FLAC files, even if the original quality was already MP3.
Does the file size change?+
Yes — FLAC files are typically larger than MP3 files, even though both will contain the same level of audio detail as the original MP3.
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Ready to convert your MP3 files?
No software needed. Works on any device. First fix is free.
Convert MP3 to FLAC free