File Convert

Convert MP4 to AU

Free online MP4-to-AU converter — upload a MP4 file and download a AU. Fast, private, no signup.

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MP4 vs AU

MP4

MPEG-4 video container; the web/mobile default.

About MP4 ↗

AU

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

About AU ↗

MP4 to AU: frequently asked questions

How do I convert MP4 to AU?

Drop your MP4 file into the converter above — we auto-detect the real format from its bytes, convert it, and give you a AU to download. No software to install.

Is the MP4 to AU converter free?

Yes. Convert MP4 to AU 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 MP4 and AU?

MPEG-4 video container; the web/mobile default. Sun/NeXT AU — a simple, long-lived PCM audio container.

Related conversions

Convert MP4 to: MOV · MKV · WEBM · 3GP · AVI · FLV · MPEG · OGV · TS · WMV

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

Browse all supported formats →