Tools / File Converter / FLAC to AU Converter

FLAC to AU Converter

Convert FLAC files to AU. Free, without uploading.

This tool converts FLAC files to AU. FLAC is lossless compressed audio: about half the size of WAV with no quality loss.

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