How to Blur Part of a Video Online
FastEdit lets you blur a selected area of a video without uploading it. Use blur regions to hide faces, names, account numbers, addresses, license plates, or anything else visible in the frame, then control exactly when each blur appears on the timeline.
Walkthrough
- 01
Open FastEdit
Go to fastedit.net. The editor runs locally in your browser with no account, install, or upload step.
- 02
Drop your video
Drag and drop your MP4, MOV, WebM, GIF, APNG, or animated WebP file onto the editor. The source file stays on your device.
- 03
Draw a blur region
Open the blur tool and draw a rectangle over the part of the video you want to hide. Resize and reposition it directly on the preview.
- 04
Set the timeline range
Use the timeline region to choose when the blur starts and ends. Add more blur regions if the sensitive area moves or appears in multiple places.
- 05
Adjust strength and preview
Increase blur strength until the content cannot be read or recognized, then scrub through the video to verify every visible frame is covered.
- 06
Export the blurred video
Choose your output format and export settings, then export. The blur is baked into the downloaded file.
Small things worth checking
- Use stronger blur than looks necessary. Text and faces should be unreadable after export, not merely softened.
- For moving content, create separate blur regions for different timeline sections instead of making one oversized region cover the whole frame.
- Trim the clip before adding blur if you only need a short segment. It makes review faster and keeps the exported file smaller.
- Crop before placing blur regions when you are reframing for TikTok, Instagram, or Shorts so the blur position matches the final frame.
- Keep the original file separately. The exported blur is permanent and cannot be removed later.