Image Mask & Watermark
Mosaic an image and add a copyright watermark, download PNG, no sign-in
Pick any image to pixelate it with an adjustable mosaic and stamp your own copyright watermark, then download it as a PNG. Choose the watermark position, corner or tiled across the image. Nothing is uploaded: the file is read and masked entirely in your browser.
Your file never leaves your device, masking runs entirely in your browser.
Higher = blockier, harder to make out.
Choose an image above to see the masked preview.
100% client-side, nothing is uploaded anywhere.
FAQ
- Is this image masking tool free?
- Yes, completely free, no sign-up and no watermark forced on your export. Add your own watermark only if you want one.
- Are my images uploaded to a server?
- No. The image is read and masked entirely in your browser; the file never leaves your device.
- Can the mosaic be reversed?
- Pixelation destroys detail, but a mosaic of a high-resolution image can sometimes be partly guessed. For true privacy, use a strong setting and consider cropping sensitive areas first.
- What format do I get?
- The download is a PNG that preserves your mosaic and watermark exactly as previewed.
