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Audio Format

AU Converter — Free Online

Convert Sun Microsystems Audio files to and from other formats. Fast, free, no registration required.

or import from

2M+ Files Converted

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How to Convert

1

Upload your AU file by dragging it into the upload area or clicking to browse.

2

Select the output format you want to convert to (or from) AU.

3

Click Convert and download your converted file in seconds.

Convert to AU

MP3 to AU→WAV to AU→FLAC to AU→M4A to AU→OGG to AU→AAC to AU→WMA to AU→AIFF to AU→

Convert from AU

AU to MP3→AU to WAV→AU to FLAC→AU to M4A→AU to OGG→AU to AAC→AU to WMA→AU to AIFF→

What is AU?

AU is an audio format created by Sun Microsystems. It's one of the oldest digital audio formats, commonly used on Unix and Java platforms.

Format Details

Full Name
Sun Microsystems Audio
Extension
.au

Key Features

  • Unix standard
  • Java audio
  • Simple format
  • Legacy support

Frequently Asked Questions

Upload your file, select AU as the output format, and click Convert. Your converted file will be ready to download in seconds.
You can convert most audio formats to AU, including MP3, WAV, FLAC, M4A, OGG, and more.
Yes! You can convert up to 5 files per day completely free. No registration required.