Audio tool

Convert AAC Files to AU on Your Device

Convert AAC to AU in your browser for legacy workstation exchange. The source remains on your device throughout local processing.

Route AAC → AU

or drop here · up to 500 MB

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When your browser supports it, your audio plays here. You can still convert your file if preview does not load.

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Adapt efficient distribution to a workflow built for legacy workstation exchange
Supply AU when an editor, player, or delivery form will not accept AAC
Create a AU copy from AAC for Unix workstations and older audio software

The device processor performs decoding and encoding during the job during this AAC-to-AU job.
Long AAC files consume more memory and take longer to decode.
Keep the source until the AU result passes a full playback check.

AU serves Unix workstations and older audio software, whereas AAC commonly serves streaming, mobile playback, and compact delivery.
For AAC-to-AU delivery, plan for limited modern consumer support.
After leaving AAC, the receiving app must support the streams encoded inside AU, not only its extension.

AAC to AU taking too long? Close other demanding apps, then test a short sample before the full file.
AU converted from AAC not opening? Test a compatible player and inspect the output streams.
A AU extension alone may not be enough; verify the required internal codec.

When does AAC to AU conversion make sense?

It is useful when AAC media created for efficient distribution must enter a AU system designed for legacy workstation exchange.

Where is the AAC source processed?

The browser prepares AU from AAC on this device instead of sending the source to a remote conversion server.

How can I approve AU converted from AAC?

Test the AU file in the receiving app and compare duration, channels and loudness with the AAC source.

Quick use cases