Private browser tool
Convert video to MP4 in your browser
Free, private, in-browser video to MP4 conversion — nothing leaves your device. Convert MOV, WebM, MKV, AVI, and other supported videos into a broadly compatible MP4.
How video conversion works here
Drop in a MOV, WebM, AVI, MKV, or other clip and this tool re-encodes it to MP4 (H.264) using ffmpeg running inside your browser. Everything happens on your device — your video is never uploaded. Video is demanding work, so conversion runs best on a computer.
When to convert a video to MP4
- Playback anywhere: open a clip on a device or player that won't read the original format.
- Required format: meet an upload that only accepts MP4.
- Screen recordings: turn a MOV screen capture into a shareable MP4.
- Standardize clips: convert a mixed set of videos into one consistent format.
Why MP4?
MP4 with H.264 video is the most universally supported format there is — it plays on virtually every phone, browser, editor, and platform without extra software. That's why it's the safe default when you're not sure what will open a file, and why MOV, WebM, and AVI clips are so often converted to it. If a file won't play or upload somewhere, converting it to MP4 is almost always the fix — and keeping your original means you can re-edit later, since each conversion re-encodes the video.
Frequently asked questions
Is my video uploaded anywhere?
No. Conversion runs entirely in your browser, so your video never leaves your device.
Which formats can I convert from?
Common ones like MOV, WebM, AVI, and MKV convert to MP4.
Does converting change the quality?
Re-encoding can cause a small quality change, usually not noticeable at sensible settings.
Do you also handle MOV files?
Yes — MOV to MP4 is one of the most common conversions this tool does.
Why does it run best on a computer?
Video encoding uses a lot of memory and processing, which a computer handles better than a phone.