Convert a video to MP4
Turn a video (MOV, WEBM, AVI, MKV, GIF…) into MP4, the format that opens everywhere, right in your browser. The file is never uploaded online.
MOV, WEBM, AVI, MKV, 3GP, GIF…
Why convert to MP4
MP4 with the H.264 codec is the most universal video format: it plays on any phone, computer, smart TV and social network, and uploads without issues to WhatsApp, Instagram, YouTube and email. If you have a video recorded in MOV (iPhone), WEBM, AVI or MKV that won't open everywhere, converting it to MP4 fixes it.
When copying is enough
If the video is already H.264, like iPhone videos recorded as «Most Compatible», many screen recordings and plenty of MKV files, turning it into an MP4 does not need recompressing: it is enough to copy it into a new container. It takes a few seconds even for a long video, and the quality stays identical. The tool notices on its own and says so before you press the button. If the video is in another format instead (VP9, AV1, HEVC or an animated GIF), it is re-encoded to H.264, and there you choose the quality.
The audio becomes AAC, the format every device can play, unless it already is: then it is copied as it is. With Remove the audio the video comes out silent, for example before putting music under it.
Just want to shrink it?
If your video is already MP4 and you mainly want to make it smaller, use the Compress video tool, which also lets you choose the resolution. If you do not know what you have in your hands (true fps, variable frame rate, rotation), look at it first with What your video really is.