About this tool
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After
This tool hides parts of a photo you don't want seen. Drag boxes over faces, license plates, names, or screen contents, and each box is covered with your choice of effect: pixelate (mosaic blocks), blur, or a solid black box. A strength slider sets how coarse the blocks or how heavy the blur is, and Undo and Clear all let you rework the boxes as you go.
The result downloads as a PNG or JPEG at the original image resolution, with every pixel outside your boxes left exactly as it was. Everything is drawn on an HTML5 canvas in your browser - your photos are never uploaded to a server.