Compress video
Make a video small enough to email or send in a chat. Pick a target size or a quality level and your browser does the rest. No upload, no watermark.
- No upload
- Free, no sign-up
- Runs on your device
Drop a video to compress
or choose a file · MP4, MOV, WebM, MKV
Stays on your device
How to use Compress Video
- 1
Drop your video
Any MP4, MOV, WebM or MKV clip.
- 2
Choose a size
Pick a target like 16 MB or 25 MB, or a quality level.
- 3
Download
Get an MP4 that plays everywhere.
How target-size compression works
A video’s file size is its bitrate multiplied by its length. When you choose a target size, GrabKit works out the highest bitrate that fits, sets aside a little room for audio, and picks a resolution that looks good at that bitrate. A 30-second clip can stay in full HD at 25 MB, while a 10-minute video at the same size will be scaled down to keep it watchable.
If the first result comes out slightly too big, GrabKit automatically runs a second, tighter pass, so the file ends up at or just under your target.
Tips for the smallest, sharpest video
Trim first. Cutting out the parts you don’t need is the best way to save space. Use the video trimmer, then compress.
720p is plenty on phones. Most people watch shared clips on a phone screen, where 720p looks almost the same as 1080p but needs far less data.
Remove the audio for screen recordings or silent clips. It saves space for the picture.
Email services commonly limit attachments to around 25 MB, and chat apps have their own limits. Check your app’s current limit and choose a target just below it.
Frequently asked questions
Is it really free with no watermark?
Yes, completely free. There is no sign-up, no watermark, no daily limit and no premium plan.
Is my video uploaded?
No. GrabKit processes your file with code that runs inside your own browser. The file is never sent to a server, so nobody (including us) can see it. You can even disconnect from the internet after the page loads and the tool keeps working.
Why is the result a little smaller than my target?
GrabKit leaves a small safety margin so the file never goes over your limit. Encoders can’t hit an exact size, so aiming slightly low guarantees it fits.
How long does compression take?
It depends on your device and the video length. GrabKit uses your computer’s or phone’s hardware video encoder when available, which is often faster than real time.
What format is the compressed video?
MP4 with H.264 video and AAC audio, the most widely supported combination. If your browser can’t encode H.264, GrabKit falls back to WebM.
Which browsers are supported?
Current Chrome, Edge, Safari and Firefox. Video compression needs a browser feature called WebCodecs, which older browsers don’t have.