Convert to AU

    Upload any audio file and convert it to AU format instantly using FFmpeg.

    All processing happens locally in your browser. No files uploaded to servers.

    Or you can just drag and drop
    files and folders

    Ready to convert to AU

    Upload a video/audio file on the left to start converting, or click above to change format

    About AU

    AU is an older audio format from Sun/Unix computers. You’d mainly use it when working with legacy systems or when you need to keep the original, uncompressed sound from those environments.

    • •Best for legacy or Unix use: a good choice only if a specific older program or Unix machine requires .au files.
    • •Original sound quality: stores audio without compression, so quality stays the same, but file sizes are much larger than MP3.
    • •Limited compatibility: many phones, browsers, and modern apps won’t play it; convert to MP3 or WAV for easy sharing.
    • •Not for the web: no web playback support, so it’s not suitable for websites or streaming.
    • •Easy to convert: most audio editors and converters can open .au and save to common formats like MP3, WAV, or FLAC.
    • •When to choose: use AU for archiving or exchanging audio with older Unix setups; for everyday listening, pick MP3 or WAV instead.

    CONVERT TO AU

    CONVERT FROM AU