Video Compress

Reduce video size with quality controls.

Formats: MP4 · WebM

Your files stay on your device.

This tool processes files locally in your browser. Nothing is uploaded to Kit servers. Your originals are never modified — Kit creates a new output.

Runs in your browser via FFmpeg WASM

The first run downloads the FFmpeg engine (~30 MB). Large videos can be slow and memory-heavy. Prefer shorter clips on mobile.

Video

MP4, WebM and common video containers. Originals are never modified.

Choose a file

Choose files from your device. On desktop you can also drag and drop.

Browse files

CRF quality28

Higher qualitySmaller file

Lower CRF keeps more detail. Higher CRF produces a smaller file.

Output name