M4B → OGG
Convert M4B audio to OGG entirely in your browser — no upload, no watermark, no sign-up.
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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.
M4B is the audiobook container, and general-purpose players lose its chapters or refuse it outright. OGG Vorbis is royalty-free and sounds better than MP3 at low bitrates, which is why game engines lean on it, so converting turns a file you are stuck with into one you can actually use. Morphix runs the whole M4B → OGG conversion locally with WebAssembly, so even confidential material never leaves your device.
Drop your M4B file above and Morphix decodes it locally, then re-encodes it as OGG 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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