Tools / File Converter / AC3 to AU Converter

AC3 to AU Converter

Convert AC3 files to AU. Free, without uploading.

This tool converts AC3 files to AU. Dolby Digital audio.

Sun/NeXT audio. AU is lossless, so the audio keeps the quality it has in the AC3 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 AC3 file, 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 AC3 file is converted to AU inside your browser.