AU Converter Online

Convert to AU Online Tool.

    How to convert to AU file?

    1. Click "Choose Files" button and select your files you would like converted.

    2. Click on the “Convert AU” button to start the conversion.

    3. When the status change to “Done” click the “Download AU” button


    What is an AU audio file? An AU (Sun Audio) file was originally developed by Sun Microsystems for use with their Sun Operating System and became widely popular as it became widely adopted across platforms and browsers such as SPARC, NeXT computer workstations, early websites, Unix-based platforms and Java systems. At first these files only stored representations of their native systems' u-law logarithmic data but over time this has changed, now supporting multiple audio data encoding formats (see examples below). AU files consist of three sections, including a 24-byte header, variable length description blocks and audio data. Current software programs capable of processing these AU files include Audacity - a cross-platform audio editor. The header section includes various pertinent data, including sample rate, number of channels and length. This data is stored using big-endian format so that most significant bytes come first followed by less significant bytes; otherwise applications may experience playback errors due to out of order bytes.

    Convert to AU

    Convert from AU


    Converting to AU

    Convert to AU Quickly and Easily

    Upload a file, click "Convert", and use additional options to quickly modify its contents before downloading the final AU file after processing has completed.

    AU Conversion from Anywhere

    Our AU converter works on Windows, Mac OS, Linux, iOS and Android systems alike - our servers automatically process each file without requiring you to install plug-ins or applications!

    Security guaranteed

    We guarantee 100% of the privacy and have no access to your files once uploaded/converted, making them inaccessible by anyone and completely protecting them.