Video & audio · runs locally
Compress a video
Big video, smaller file, still watchable. Dial in the quality and see the savings before you commit.
- 1Drop a video
The current size is your baseline.
- 2Pick a target
Balanced is CRF 23, Smaller is 28, Tiny is 32. Higher CRF means a smaller file and more visible compression.
- 3Optionally shrink the frame
720p is plenty for messaging and most viewing. Press Estimate from a 3 s sample to see the likely output size before committing.
Questions people actually ask
Why is my compression slow?
Video compression is genuinely heavy work, and this runs on your CPU rather than a rack of servers. A one-minute clip at Medium takes a couple of minutes.
Will the audio survive?
Yes, with a modest audio bitrate so it doesn't undo the savings.
How accurate is the estimate?
It encodes the first 3 seconds with the same settings and scales that to the full length. It's a guide, not a promise - scene changes can throw it off by 10-20%.