Shrink a video a lot and keep it looking good.
Drop an MP4, MOV or WebM file.
720p at Medium is a good start for sharing.
Check the result in the player, then save it.
No. It is processed by your browser, so it never leaves your device.
It depends on the video. Lowering the picture size and quality makes the biggest difference. The size of the result is shown when it is done.
MP4 and WebM output. It reads MP4, MOV, WebM and MKV files that your browser can play.
Your browser uses the computer's own video encoder, and a graphics chip when there is one.
If the video is already small, re-encoding can make it larger. The tool tells you when that happens, so keep the original.