Blur & Pixelate Image

This tool does not find anything for you. There is no face detection or plate recognition; you draw one or more rectangles directly over the region you want obscured, and each box gets either a Gaussian blur at a radius you set or a pixelation effect with a block size you set, anywhere in the frame, before you export.

The reason this matters is what happens on export. The blurred or pixelated region is rendered onto the canvas and the whole image is re-encoded from it, so the original pixel values underneath are discarded, not hidden behind a layer. That is different from a black rectangle drawn in a PDF viewer, where the original text often still exists underneath and can be extracted, or from the class of bugs sometimes called the Acropalypse, where a cropped or redacted screenshot on some phones retained the original data past the end of the new, shorter file. Once this tool re-encodes the canvas, the covered pixels genuinely no longer exist in the file.

That said, redaction strength is a real variable. A light blur radius, or a pixelation block only a little larger than the detail underneath, does not destroy the underlying information as completely as it looks like it does. A short PIN, a house number, or a low-resolution plate blurred with a small radius has a small enough space of possibilities that someone motivated could brute-force a reconstruction against the blurred result, and coarse pixelation with a small block size shares that weakness. If what you are hiding is short and predictable in format, use a high blur radius or a large pixelation block, and cover more area than just the digits themselves.