QRix
Any playable video in → choose MP4 or WebM out. Fast, private, free.
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Yes — completely free, no watermark, no signup, no file limits beyond your device's memory.
No — everything runs on your device in the browser. Your videos never leave your computer.
Real MP4 (H.264) where your browser can encode it — Chrome, Edge and Safari — with WebM (VP9) as an automatic fallback elsewhere. Everything is transcoded on your device; nothing is uploaded.
Processing is in-memory, so a few hundred MB works comfortably on most devices; very long 4K files depend on your RAM.
Yes. Pick MP4 as the output and the tool encodes real H.264 MP4 on your device wherever your browser supports it (Chrome, Edge, Safari). You can also convert MP4 to WebM.
The Converter re-encodes anything your browser can play (MP4, MOV, MKV, AVI with common codecs) to either MP4 (H.264) or WebM (VP9). It uses your browser's built-in WebCodecs engine to demux and re-encode the actual video stream on your device — real transcoding with live progress, not a screen recording, and nothing is uploaded.
It's free, private and works right in your browser — no signup, no watermark.