Tools / File Converter / ASF to AU Converter

ASF to AU Converter

Convert ASF files to AU. Free, without uploading.

This tool converts ASF files to AU. Advanced Systems Format.

Sun/NeXT audio. Only the audio of the ASF video is kept and saved as AU; the picture is dropped. AU is lossless, so the audio keeps the quality it has in the ASF file.

Conversion runs on your device; your file is never sent to a server. The components download once on first use, and later conversions start right away.

How to use

1. Choose the ASF video, drag it in, or paste its link.
2. Choose the audio quality; optionally enter a start and end time.
3. Press "Convert" and download the AU file.

Frequently asked questions

Will audio quality drop when converting to AU?

No. AU is lossless.

Is there a file size limit?

No fixed limit; your device’s memory decides. Computers usually handle files up to 1–2 GB.

Is my file uploaded?

No. Your ASF file is converted to AU inside your browser.