AU to WAV Converter

Convert AU (Sun/NeXT AU audio) files to WAV online, for free, with nothing to install.

To convert AU to WAV, select or drop your .au file above, check that WAV is chosen as the output, and click Convert. This conversion runs on our server, and your files are deleted 72 hours later.

What is an AU file?

AU – Sun/NeXT AU audio. AU is the audio format of Sun and NeXT computers, simple and old; Unix tools and some programming libraries still read it. Converting makes a new file: the sound is decoded and written again, so converting from a lossy format never brings back what was lost.

AU Converter →

What is a WAV file?

WAV – WAV audio. WAV is uncompressed audio from Microsoft and IBM: every sample is kept, so files are large (about 10 MB a minute) and editing programs love them. Converting makes a new file: the sound is decoded and written again, so converting from a lossy format never brings back what was lost.

WAV Converter →

How to convert AU to WAV

  1. Click Select File, or drop your .au files anywhere on this page. You can add several at once.
  2. Check that WAV is chosen as the output format. On this page it is picked for you.
  3. Click Convert. When a file has to go to our server, the button says Upload and convert instead.
  4. Click Download next to each file when it's done.

AU vs WAV: how they compare

AUWAV
LayoutA stream of soundA stream of sound
EditableIn audio editorsIn audio editors
Created bySun Microsystems, 1992Microsoft and IBM, 1991
Best forUnix programs and scientific toolsAudio editing and recording

Good to know

  • The sound is decoded and written as a WAV file, every sample kept.
  • Tags such as title and artist are kept where the new format has room for them. Only the first audio track is converted; pictures and video are left out.

Frequently asked questions

Is converting AU to WAV free?

Yes. Everyone gets 25 free credits a day, with no account needed. Conversions on our server use one credit per started minute of work, so most cost a single credit. Credits reset at midnight UTC.

Are my AU files uploaded anywhere?

This conversion runs on our server, because converting audio needs ffmpeg, which does not run in a browser. Your file is sent over an encrypted connection, and both it and the result are deleted 72 hours after the conversion. The server has no internet access while it works on your file.

How large can the AU file be?

Up to 1 GB per file. This conversion runs on our server, which accepts files up to that size.

Will the WAV look the same as the AU?

Yes for the sound: every sample is kept, and tags such as title and artist are kept where WAV has room for them.

Can I convert several AU files at once?

Yes. Add as many files as you like; they are converted one after another, and each one gets its own Download button.

How long does converting AU to WAV take?

In our tests a one-hour WAV recording became an M4A file in about 46 seconds. A song of a few minutes takes a few seconds, and most conversions cost a single credit.

Convert AU to other formats

Convert other files to WAV

All audio formats

Updated