Draw black box or blur regions over sensitive content in videos. Browser-only FFmpeg.
Drop a file or click to choose
mp4 · mov · webm supported
🔒 Your file is processed in your browser. It is not uploaded to any server for this tool.
Upload
Add redaction region
Export MP4
Instant — No Install
Works directly in your browser. No app download needed.
Private & Secure
Your video never leaves your device for free tools.
No Login Required
Just upload and start editing. No account needed.
No Watermark
Export clean videos without any CutKarlo branding.
Free, no login, runs in your browser. Just upload and start.
No login · No watermark · No upload to server