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Convert AU to AAC

Free online AU-to-AAC converter — upload a AU file and download a AAC. Fast, private, no signup.

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AU vs AAC

AU

Sun/NeXT AU — a simple, long-lived PCM audio container.

About AU ↗

AAC

Advanced Audio Coding (lossy, MP3 successor).

About AAC ↗

AU to AAC: frequently asked questions

How do I convert AU to AAC?

Drop your AU file into the converter above — we auto-detect the real format from its bytes, convert it, and give you a AAC to download. No software to install.

Is the AU to AAC converter free?

Yes. Convert AU to AAC for free right in your browser, with no account needed to get started.

Is it safe and private?

Your file is transferred over an encrypted connection and anonymous uploads are temporary. You can also view and strip metadata (location, device, author) before you download.

What's the difference between AU and AAC?

Sun/NeXT AU — a simple, long-lived PCM audio container. Advanced Audio Coding (lossy, MP3 successor).

Related conversions

Convert AU to: MP3 · WAV · FLAC · M4A · AC3 · AIFF · CAF · DTS · M4B · M4R

Convert to AAC from: AC3 · AIFF · AMR · APE · CAF · DFF · DSF · DTS · FLAC · M4A

Browse all supported formats →