AU to MP3 Converter

Batch convert au files to mp3 format online for free

Choose files or drag & drop them here.
Only you have access to your files.
All files will be deleted after one hour.

How to convert AU files to MP3 online?

Step-by-step guide to convert au to mp3 using AnyConv. It works on PC (Windows, Mac, Linux) and mobile devices (iPhone, Android).

Upload AU-file

Drag and drop your AU file into the upload area. The maximum file size is 100 MB.

AU to MP3

Click "Convert" to change au to mp3. The conversion usually takes a few seconds.

Download your MP3

Now you can download the MP3 file. The download link only works on your device.


  • ❓ How can I convert files from AU to MP3?
    First you need to add file for conversion: drag and drop your AU file or click the "Choose File" button. Then click the "Convert" button. When AU to MP3 conversion is completed, you can download your MP3 file.
  • ⏱️ How long does it take to convert AU to MP3?
    Audio conversion is pretty fast. You can change AU to MP3 in a few seconds.
  • 🛡️ Is it safe to convert AU to MP3 on AnyConv?
    Of course! We delete uploaded files immediately, and converted ones after 1 hour. No one has access to your files. File conversion (including AU to MP3) is absolutely safe.
  • 💻 Can I convert AU to MP3 on Mac OS or Linux?
    Yes, you can use AnyConv on any operating system that has a web browser. Our AU to MP3 converter works online and does not require software installation.

Information about AU and MP3 file formats

🔸 File format AU MP3
🔸 Full name Sun Microsystems AU files MP3 - MPEG-1 or MPEG-2 Audio Layer III
🔸 File extension .au .mp3
🔸 MIME type audio/basic audio/mpeg, audio/MPA, audio/mpa-robust
🔸 Developed by Sun Microsystems Fraunhofer Institute
🔸 Type of format Digital audio
🔸 Description The AU file format is a simple audio file format introduced by Sun Microsystems. AU format was common on NeXT systems and early Web pages. Originally it was headerless, being simply 8-bit μ-law-encoded data at an 8000 Hz sample rate. Hardware from other vendors often used sample rates as high as 8192 Hz. Newer AU files have a header that consists of six unsigned 32-bit words. MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is an audio coding format for digital audio that uses lossy data compression. It is a common audio format for consumer audio streaming or storage and a de facto standard of digital audio compression for the transfer and playback of music on most digital audio players.
🔸 Technical details Lossy compression is designed to reduce significantly the amount of data required to represent the audio recording and still sound like a faithful reproduction of the original uncompressed audio. For example, an MP3 file created using the setting of 128 kbit/s will result in a file about 1/11 the size of the CD file created from the original audio source.
🔸 File conversion AU conversion MP3 conversion
🔸 Associated programs Nullsoft Winamp, Apple QuickTime Player, Microsoft Windows Media Player, RealNetworks RealPlayer Cloud, Adobe Audition CC VLC media player, MPlayer, Winamp, foobar2000.
🔸 Wiki
AU to MP3 Conversion Quality Rating
4.3 (182 votes)
Convert and download at least one file to rate.