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Why convert AU to FLAC?
Fast
Your file is converted in under 30 seconds in our cloud.
Secure
Files are automatically deleted after 1 hour.
Quality preserved
Maximum quality preserved during conversion.
About the AU format
AU — Sun Microsystems Audio Format
AU is a simple audio format developed by Sun Microsystems and used in Unix/Linux environments. It supports multiple audio encodings and was commonly used in Java applications and Unix systems.
Common uses
- Legacy Unix/Linux audio files
- Java audio applications
- System sounds
- Old internet audio clips
About the FLAC format
FLAC — Free Lossless Audio Codec
FLAC is the most popular lossless audio compression format. It compresses audio files by 40-60% without losing any audio quality, making it the preferred format for audiophiles who want perfect sound with manageable file sizes.
Common uses
- Audiophile music collections
- High-resolution audio (24-bit/96kHz)
- Music streaming services (Tidal, Qobuz)
- Digital audio archiving
Related conversions
Other conversions available for AU and FLAC files
Frequently asked questions
Is the conversion free?
Yes, basic conversion is completely free. For large volumes, check out our paid plans.
What is the maximum file size?
Free accounts can convert files up to 25 MB. Pro accounts up to 100 MB.
How long are my files kept?
Files are automatically deleted after 1 hour on the free plan, 24 hours on Pro.
What formats are supported?
We support over 200 source and target formats. See our complete formats page.