M4A → AMR
Convert M4A audio to AMR 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.
M4A hides AAC audio inside an MP4 container, which some hardware players refuse to open. AMR is the compact narrowband speech codec built for phone recordings and MMS-era hardware, so converting turns a file you are stuck with into one you can actually use. Morphix runs the whole M4A → AMR 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 AMR 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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