Can I pixelate more than one area?
Yes. Even though the page is focused on one-part pixelation, you can still apply repeated selections before exporting.
Does pixelation happen in the browser?
Yes. The whole editing flow runs locally in the browser without server-side processing.
Why use this instead of a full image editor?
Because the job is usually small and specific. A focused pixelation tool gets from upload to export faster for this kind of cleanup.
Can I pixelate several areas of the same image?
Yes. Each rectangle you draw is applied as an independent edit, and they all get baked into the single flattened export.
Is pixelation secure?
Not for text. It averages blocks in a predictable way, so an attacker who knows the font can render candidate strings, pixelate them with the same grid and match the averages. For anything readable, use an opaque box.
What block size should I use?
Large enough that the shape of the underlying content is gone. If you can still see where the letters or the eyes were, the block size is too small. Judge it at full zoom, not in the preview.
Why use pixelation at all then?
Because it reads as a deliberate edit. On a face, a logo or a background screen, pixelation tells the viewer that something was removed, which is often exactly the message you want, and the content is not a secret.
Does the exported image contain the original region?
No. The pixelation is painted onto the canvas and the export is encoded from those pixels, so there is no hidden full-resolution copy in the file.