AU Converter
A simple uncompressed format from Unix workstations, still used by Java and some legacy systems.
Drop files to convert to AU
MP3, WAV, FLAC, M4A, OGG, OPUS, AAC, AIFF, WMA, AMR, MP4, MOV & more ยท Processed on your device - nothing is uploaded
AU at a glance
| Full name | Sun/NeXT Audio |
|---|---|
| Type | uncompressed |
| File extension | .au, .snd |
| MIME type | audio/basic |
| Developer | Sun Microsystems (1992) |
| Best for | Java applications and legacy Unix tools |
| Compatibility | Java, Audacity, SoX, VLC. |
| Bit depths | 16-bit, 24-bit, 32-bit float |
About AU
What is a AU file?
AU (Sun/NeXT Audio) is a uncompressed audio format developed by Sun Microsystems in 1992. A simple uncompressed format from Unix workstations, still used by Java and some legacy systems.
What is AU best for?
AU is best for Java applications and legacy Unix tools.
What plays AU files?
Java, Audacity, SoX, VLC.
How big are AU files?
About ~10 MB at 16-bit / 44.1 kHz per minute of stereo audio.
How do I convert to AU?
Drop your files above, make sure AU is selected and click Convert. It's free and works on any device.