WEBM → MKV
Convert WEBM video to MKV 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.
WEBM is built for the open web and is routinely rejected by editors, phones and social uploaders. MKV is the flexible open container that keeps every audio track, subtitle and chapter in one file, so converting turns a file you are stuck with into one you can actually use. Morphix runs the whole WEBM → MKV conversion locally with WebAssembly, so even confidential material never leaves your device.
Drop your WEBM file above and Morphix decodes it locally, then re-encodes it as MKV 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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