Pixelate faces in a video with mosaic
Mosaic turns the pixels inside each face mask into large color blocks. Strength sets the block size; margin sets how far the mask reaches past the face.
Updated August 20, 2026
Mosaic, blur, or solid?
| Effect | Control | Use |
|---|---|---|
| Mosaic | Strength changes block size | Hides detail but keeps some color and motion |
| Soft blur | Strength changes blur radius | Keeps more facial structure visible |
| Solid | No strength setting | Hides every pixel inside the mask |
Set block size and margin
Raise strength until facial details disappear both in motion and on a paused frame. Increase margin when the forehead, chin, or sides reach past the mask. These settings apply to every face FaceBlur finds.
What mosaic does not fix
- Small blocks can leave a face recognizable.
- A tight mask can expose the edge of a moving face.
- No amount of strength or margin helps when the detector misses a face.
- Voice, clothing, tattoos, location, and context can still identify someone.
Mosaic only changes the detected area. Use solid cover if you need to hide all pixels inside the mask, and remove audio when voices matter.
Try mosaic on a short clip
Check the masks at normal speed and while paused, then watch the export.
Pixelate faces