WMA – Windows Media Audio
WMA is Microsoft's audio format. It plays in Windows apps but has limited support elsewhere.
More WMA conversionsDrop your WMA files here
or click to choose WMA files · up to 95MB each
How to convert WMA to AU
- Choose your files. Click Select File or drag your WMA files into the upload box. You can add many at once.
- Pick the settings. AU is already selected as the output format. The conversion starts as soon as a file is added.
- Download. Each file appears in the list when it is ready. Download them one by one, or all together with Download all.
AU – Sun Audio
AU is a simple audio format introduced by Sun Microsystems, still found on Unix systems and in Java applications.
More AU conversionsConverting WMA to AU
- Your WMA file is converted on our server and the AU result can be downloaded straight away.
Frequently asked questions
How do I convert WMA to AU?
Click Select File or drop your WMA file onto the upload box. The converted AU appears in the list below with a download button. You can add many files at once and download them together as a ZIP.
Is it really free?
Yes. There is no sign-up and no watermark. To keep the service available for everyone there is a 95MB limit per file and a cap on how many files one connection can process in a short period.
Are my files stored?
Your upload is used only to make the converted file. Images are processed in memory; other files are written to a private temporary folder that is deleted as soon as the conversion finishes. Nothing is kept after the result has been sent back.
Will quality drop?
For images, a little, by design: the image is re-encoded at the Quality you choose (default 75%). Audio and video are re-encoded with high-quality settings; documents keep their text and layout as far as the target format allows. Converting never restores detail that is already missing from the original.
How this works: your file is uploaded over HTTPS and converted on this server with open-source engines (libvips for images, FFmpeg for audio and video, LibreOffice and Pandoc for documents, Calibre for ebooks, Ghostscript and Inkscape for PDF and vector files). Images are processed in memory; other files use a private temporary folder that is deleted as soon as the conversion finishes.