AU to MP3 Converter
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What is a AU file?
AU is a simple audio format developed by Sun Microsystems, originally for Unix systems. It was once common in early internet applications and multimedia software. AU files can contain various types of audio data, including uncompressed PCM or μ-law encoded samples.
Although largely outdated today, AU files are still supported by many open-source players and audio editors. They’re mostly found in old software archives and educational materials.
How to open AU files
AU files are supported by players like Audacity, VLC, and GoldWave. They're also readable by older UNIX-based systems and open-source software.
If you need a more universal format, convert AU to MP3 or WAV using AnyConv.
Key facts about AU
- Full name: Sun Audio File
- Extension: .au
- MIME type: audio/basic
- Developed by: Sun Microsystems
- Initial release: 1982
Useful links and resources
What is a MP3 file?
MP3 is one of the most iconic and widely used audio formats in the world. It uses lossy compression to significantly reduce file sizes while maintaining acceptable sound quality. MP3 revolutionized digital music distribution and became the standard format for portable media players and online music sharing.
Thanks to its balance of quality and size, MP3 remains highly relevant for casual listening, streaming, and downloading music. Nearly every media player and device supports it natively.
How to open MP3 files
MP3 files can be opened with virtually any media player: Windows Media Player, iTunes, VLC, Winamp, and countless mobile apps all support the format.
You can also convert MP3 to other formats like AAC or WAV quickly using AnyConv online.
Key facts about MP3
- Full name: MPEG-1 Audio Layer III
- Extension: .mp3
- MIME type: audio/mpeg
- Developed by: Fraunhofer Society
- Initial release: 1993
Useful links and resources
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❓ Frequently Asked Questions
- Do I need to register to convert AU files?Not at all! You can convert AU to MP3 without signing up or installing anything.
- Is it safe to convert AU to MP3 on AnyConv?Absolutely. All AU and MP3 files are securely handled and automatically deleted after 1 hour. Nobody can access your data.
- Will the quality change after converting AU to MP3?We do our best to preserve the original quality during AU to MP3 conversion. The result is accurate and clean.
- How long does it take to convert AU to MP3?Most conversions from AU to MP3 take just a few seconds — even for larger files.
- Can I upload more than one AU file?Yes, batch conversion is supported. You can convert multiple AU files to MP3 at once — fast and easy.
- What browsers support AU to MP3 conversion?All modern browsers! Chrome, Firefox, Safari, Edge — AnyConv runs online and supports converting AU to MP3 on any platform.