Convert AAC to FLAC Online
While converting lossy AAC to lossless FLAC does not improve quality, it creates a universally compatible archive format for your audio collection.
FLAC is supported by more dedicated audio players and devices than AAC, making this conversion useful for audiophile hardware.
What is AAC?
AAC (Advanced Audio Coding) is a lossy audio format used by Apple Music, iTunes, and YouTube. It offers excellent quality at small file sizes.
While AAC has great quality, it has limited support on some dedicated audio players and Linux systems compared to FLAC.
What is FLAC?
FLAC (Free Lossless Audio Codec) is a lossless format supported by most dedicated audio players, Android devices, and music servers.
FLAC is the preferred format for music servers like Plex and Jellyfin, and for dedicated audio players from Sony, FiiO, and Astell&Kern.
Why Convert AAC to FLAC?
Audiophile Hardware
Dedicated audio players and DACs often prefer or require FLAC format for playback.
Music Servers
Media servers like Plex, Jellyfin, and Navidrome handle FLAC better than AAC.
Metadata Preservation
FLAC supports comprehensive metadata tags for organizing large music libraries.
Open Format
FLAC is an open standard with no licensing restrictions, unlike AAC.
How to Convert AAC to FLAC
Upload AAC file
Select your AAC or M4A file using the upload button.
Select FLAC output
Choose FLAC as your output format.
Convert
Click convert and wait for completion.
Download FLAC
Save your FLAC file for use with your preferred audio system.
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Convert AAC to FLAC NowPro Tips
Quality stays the same
Converting lossy AAC to lossless FLAC does not add quality - the audio data already lost in AAC compression cannot be recovered.
Use for compatibility
Convert to FLAC specifically when your hardware or software requires it.
Check hardware support
Verify your device supports FLAC before converting your entire library.
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Our converter handles all AAC files automatically with no quality loss.
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Convert AAC to FLAC Now