Choose your AAC file
Select AAC from your device. The file is processed locally.
ON YOUR DEVICE
AAC to FLAC
Convert AAC audio to FLAC on your device. Choose settings and download the result.
Drop your file here
One file · Device-dependent capacity · Best for short clips
Files stay on your device
Three simple steps
Prepare FLAC output
FLAC compresses audio losslessly. It cannot restore detail already removed from a lossy source.
Save and check your FLAC file
Converting a lossy recording cannot recover lost audio detail. Tags, artwork, chapters and DRM protection are not preserved or bypassed.
Common questions
What changes when I convert AAC to FLAC?
AAC output uses an ADTS stream. Use M4A instead when your player expects an MPEG-4 container. FLAC compresses audio losslessly. It cannot restore detail already removed from a lossy source. Converting a lossy recording cannot recover lost audio detail. Tags, artwork, chapters and DRM protection are not preserved or bypassed.
Will the FLAC file be smaller?
Not necessarily. FLAC compresses audio losslessly. It cannot restore detail already removed from a lossy source. Size depends on the source and settings. The result reports file sizes and processing time.
Which AAC files work here?
The container must contain decodable media. Encrypted or DRM-protected streams are unsupported. Test a short sample if your recording uses an unusual codec.
Is there a size cap for AAC to FLAC?
There is no fixed file-size quota. Process one main file at a time. Your device memory and browser determine practical capacity. Large selections show a warning that you can continue past.