AU → M4A
Convert AU audio to M4A entirely in your browser — no upload, no watermark, no sign-up.
Drop files here
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images · audio · video · documents · archives · up to ~500MB
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Runs in your browser. No upload.
Instant
No queue, no server roundtrip.
Offline-ready
Works after first load.
AU is a Sun-era audio format that survives in old Unix and academic archives and almost nowhere else. M4A is the native Apple audio container, so the file drops straight into Music or a podcast editor with tags intact, so converting turns a file you are stuck with into one you can actually use. Morphix runs the whole AU → M4A conversion locally with WebAssembly, so even confidential material never leaves your device.
Drop your AU file above and Morphix decodes it locally, then re-encodes it as M4A using WebAssembly + the browser's native codecs. Nothing is ever uploaded — your files stay on your device. Batch as many files as your machine can handle.
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