runs 100% in your browser
Make an MP4 smaller
Free, in your browser, nothing uploaded. Drop the file, press the button.
Same video, fewer megabytes: ShrinkClip re-encodes your MP4 at a bitrate calculated from the exact size you need, instead of a one-size-fits-all quality knob. It runs on your own machine — “online tool” here means the page, not your file.
uses your device's built-in video encoder · nothing to install · no file ever leaves your browser
No upload queue
Compression runs on your own CPU. A 500 MB recording never crawls up your connection to someone's server — there's nothing to upload, wait on, or trust.
No command line to learn
The same H.264 encoding professionals tune by hand — with the bitrate math and resolution worked out for you. Pick a size, press the button.
Private by default
Your video is processed in browser memory and discarded when you close the tab. We never see a frame of it — only anonymous size and preset stats.
Questions people actually ask
How much smaller can an MP4 get?
It depends on how efficiently it was encoded to begin with. Phone videos and screen recordings often shrink 80–95% before quality visibly suffers; an already-optimized MP4 has less fat to cut.
Do I lose quality every time I re-compress?
Each re-encode costs a little, like re-photocopying a page. Compress from the original file when you can, and pick your real target size the first time.