Why Tools Ku
- ✓100% free, no signup
- ✓ffmpeg.wasm local transcoding
- ✓Tune resolution and CRF for size vs quality
- ✓For social, email, and web uploads
Phone clips and screen recordings are often too large to share. Re-encode in-browser with ffmpeg.wasm—lower height and raise CRF to cut size.
Higher CRF = smaller file, lower quality (often 23–32). Local-only but CPU-heavy; allow time for progress to finish.
Steps
- 1Upload the video
- 2Set max height (720p, 1080p, etc.) and CRF
- 3Start compress and wait for local ffmpeg
- 4Preview and download the result