Convert tools

Image mosaic — pixelate a selected area

Apply a block mosaic to a rectangular part of a photo. Drag to select the region, adjust block size and preview the PNG.

Convert in your browser · No sign-up

One static JPG, PNG, WebP or AVIF · up to 20 MB and 24 megapixels

How to use

  1. Choose the supported files from your device.
  2. Select the area and set the block size before applying the mosaic.
  3. Run the conversion, check the result, then download it.

Example

A 200 × 100 area with 20-pixel blocks is sampled to 10 × 5 cells.

Details and limitations

Only the selected rectangle changes. Mosaic is not reliable redaction; remove sensitive information before sharing.

Conversion runs locally in your browser. This tool does not upload the chosen files.

FAQ

Can I add another mosaic area?

Download the result and reopen it to apply a second rectangle.

Are my files uploaded?

Conversion runs locally in your browser. This tool does not upload the chosen files.