Pixelate / Mosaic
Pixelates an image — the whole frame, or just the regions you drag over — to hide faces, plates, names and anything else that should not ship. The pixelation is burned into the pixels in your browser; the covered detail is not merely overlaid.
How to use
- Drop the image.
- Drag over each region to hide — a face, a plate, an account number. Repeat as needed.
- Adjust the block size: bigger blocks, stronger anonymisation.
- Download the result and keep the original somewhere private.
When you actually need this
- Blurring bystanders' faces before posting a street photo.
- Hiding names, numbers and balances in a screenshot used for a bug report or tutorial.
- Masking licence plates in a marketplace listing or dashcam clip frame.
- Anonymising third parties in evidence photos shared with support or authorities.
How safe is pixelation?
Mosaicking replaces each block with its average colour, destroying detail rather than covering it — the information is genuinely gone from the exported file, unlike a black bar drawn on a separate layer in some editors. Two cautions: coarse blocks on a small region can sometimes be narrowed down if the hidden content is from a tiny known set (a licence-plate format, a short number), so use generous block sizes and cover a little more than the minimum. And check the corners — reflections, shadows and background screens leak more identity than people expect.
Related tools
FAQ
Are my photos uploaded to a server when I use Pixelate / Mosaic?
No. Pixelate / Mosaic reads the file with the browser's Canvas API and processes every pixel on your own device. The image never leaves your computer, which is why it still works if you go offline after loading the page.
Will Pixelate / Mosaic reduce the quality of my image?
That depends on the setting you choose. JPEG and WebP are lossy, so a lower quality value means a smaller file and more visible artifacts; PNG is lossless and keeps every pixel exactly. Start around 80 percent quality — most photos stay visually identical at roughly a third of the original size.
Is there a file size or count limit?
There is no limit imposed by the site, because nothing is uploaded. The practical ceiling is your device's memory — very large files (over roughly 50 MP) may be slow on an older phone.