Tools / File Converter / MKV to AU Converter

MKV to AU Converter

Convert MKV files to AU. Free, without uploading.

This tool converts MKV files to AU. MKV (Matroska) is a flexible container that can hold several audio and subtitle tracks. It is common on computers, but phones and TVs don’t always play it.

Sun/NeXT audio. Only the audio of the MKV video is kept and saved as AU; the picture is dropped. AU is lossless, so the audio keeps the quality it has in the MKV 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 MKV 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 MKV file is converted to AU inside your browser.