Convert a Video to MP4
Turn your MOV, AVI, MKV or WebM videos into MP4 that plays everywhere, free and with nothing to install. Everything runs entirely in your browser, so your file is never sent to a server.
Drag and drop a video here, or click to choose a file
MP4, MOV, WebM, MKV, AVI — up to 500 MB. Nothing is sent to a server.
Why convert a video to MP4 in the browser?
Unlike traditional online converters, nothing is uploaded: the video is processed locally by your browser. It's faster, more private, and there's no server-imposed rate limit.
MP4 is the most universal video format: it plays on almost any device, phone and platform. Perfect for converting a MOV, WebM, MKV or AVI before sharing, publishing or archiving your video.
Frequently asked questions
Are my files uploaded to a server?
No. Conversion runs entirely in your browser using hardware acceleration (WebCodecs). Your video never leaves your device.
Which formats can I convert to MP4?
The most common formats: MOV, AVI, MKV, WebM and MP4. The output is an MP4 (H.264) compatible with all players, phones and social networks.
Is quality preserved?
Yes. The conversion keeps the original resolution and quality; it only changes the format (container) of the video.
Is the tool free?
Yes, conversion is completely free with no sign-up. Voxdub also offers an online dubbing studio, with a 7-day free trial.
Need to dub or subtitle this video?
Voxdub is an online dubbing and rythmo band studio. Import your video, generate subtitles, dub into multiple languages.
Try Voxdub for free7-day free trial · no install · rated 4.5/5 on Google