Image Mosaic
Select areas to apply mosaic, blur, or black block effects for privacy protection. All processing happens in your browser — no image upload, completely free.
FAQ
After uploading an image, drag to select the areas you want to hide. You can select multiple regions. Choose mosaic, blur, or black block, adjust intensity, then export.
Mosaic turns the area into pixels, blur makes details unclear, and black block fully covers it. Use black block or large mosaic for sensitive data like ID numbers or bank card numbers to prevent recovery.
Black blocks cannot be reversed; larger mosaic patterns are safer. The output is a new image — original pixels are not preserved.
No. Selection and processing happen entirely in your browser — images never leave your device.