Convert Video
100% private — runs on your device, never uploaded. Works offline once loaded.
Change a video into a format the thing you are using will actually accept. MOV from an iPhone into MP4 for a Windows machine, MKV from a download into something a phone will play, AVI from an old camera into anything at all. It reads essentially every format FFmpeg does — MP4, MOV, WebM, MKV, AVI, WMV, FLV, 3GP — and writes MP4 with H.264 and AAC, which plays on more or less everything made in the last fifteen years. You can resize the frame in the same pass. Nothing is uploaded and nothing is watermarked.
Frequently asked questions
Which format should I pick?
MP4 unless you have a specific reason not to. H.264 video with AAC audio in an MP4 container is the closest thing to a universal format — phones, browsers, TVs, editors and social platforms all take it.
Why is WebM written with VP8 rather than VP9?
VP9 is compiled into the engine but exhausts the browser’s WebAssembly memory on any real clip, hanging or crashing the encode. VP8 is stable, so that is what WebM output uses. Files are somewhat larger than a VP9 encode would be.
Is my video uploaded?
No — the conversion happens entirely in your browser and the file never leaves your device.
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