Free online image mosaic/blur tool to pixelate specific areas of an image. Easily blur faces, personal info, and sensitive content.
How to use Image Mosaic?
Upload your image.
Drag to select the area to mosaic.
Adjust mosaic intensity and download the image.
Frequently asked questions about Image Mosaic
Can I adjust mosaic intensity?
Yes, adjust the pixel size to set the mosaic intensity as you prefer.
Are images uploaded to a server?
No, all processing happens in your browser. No images are sent to any server.
Can a pixelated area ever be restored to the original?
Not from the saved file. Pixelation overwrites the pixels in that area with averaged blocks, so the original information is simply no longer in the file. Note that a coarse grid is safer than a fine one: with small blocks, a face outline or the shape of digits can still be inferred. For something as sensitive as an ID number, covering it with a solid black rectangle is more reliable than a mosaic.
Does it also strip the location and camera data stored in the photo?
Yes — redrawing and re-exporting the image drops the EXIF metadata along the way. That matters as much as the mosaic itself: hiding a face is pointless if the GPS coordinates of the street outside your home stay embedded in the file. If you actually need to keep the shooting data, archive the original before running it through this tool.
How to get the most out of Image Mosaic?
Weak pixelation can be reversed, so raise the block size and zoom in on the result before sharing.
Faces, licence plates and screen addresses are the usual things that must be masked before posting.
Save the masked version as a new file — overwriting the original leaves you no way back.