M4A → CAF
Convert M4A audio to CAF entirely in your browser — no upload, no watermark, no sign-up.
Drop files here
or browse from your device
images · audio · video · documents · archives · up to ~500MB
100% Private
Runs in your browser. No upload.
Instant
No queue, no server roundtrip.
Offline-ready
Works after first load.
M4A hides AAC audio inside an MP4 container, which some hardware players refuse to open. CAF is Apple's Core Audio container, built for very long recordings without the 4 GB ceiling, so converting turns a file you are stuck with into one you can actually use. Morphix runs the whole M4A → CAF conversion locally with WebAssembly, so even confidential material never leaves your device.
Drop your M4A file above and Morphix decodes it locally, then re-encodes it as CAF 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.
Keep your files & browsing private — get NordVPN