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Convert AU to FLAC
Convert AU to FLAC format — 100% browser-based, no upload required.
2 cores · low tier
Drop a file here or click to select
Format will be auto-detected
About these formats
Source
AU
Sun/NeXT AudioSimple audio format from Sun Microsystems. Originally used in Unix systems and Java audio. Typically stores µ-law compressed audio.
Best for
Unix/Java audioLegacy systemsSimple audio storage
Advantages
- + Simple format
- + Java support
- + Compact for telephony
Limitations
- − Outdated
- − Low quality
- − Limited use
Target
FLAC
Free Lossless Audio CodecLossless audio compression reducing file size by ~50% while preserving perfect audio quality. Ideal for music archival.
Best for
Music archivalAudiophile collectionsLossless backupsHi-Fi audio
Advantages
- + Perfect quality
- + ~50% smaller than WAV
- + Open source
- + Metadata support
Limitations
- − Larger than MP3
- − Limited portable device support