How to blur part of a photo

Sometimes only one piece of a photo needs to disappear: a stranger's face in the background, a license plate, a screen showing private information, or a busy backdrop you want to fade behind your subject. Blurring the entire image would ruin it. What you actually need is a selection — the part of the photo the blur applies to — and a filter that only touches what's inside it.

That combination, select then filter, is how targeted blur works in any real photo editor, and it is exactly what the EditItAll photo editor does.

• Open the photo editor and load your image (PNG, JPG or WebP).
• Select the area to blur with the lasso tool for a freeform shape, the marquee for a rectangle or oval, or the magic wand to grab a similarly colored region like a background.
• Feather the selection a few pixels so the edge of the blur fades in instead of showing a hard ring.
• Apply the Gaussian blur filter and increase the radius until the area is unrecognizable.
• Export as PNG or JPG once you're happy with the result.

A blur that starts and stops on a hard line looks obviously edited. Feathering softens the boundary of your selection before the filter runs, so the blurred area fades into the sharp photo instead of sitting inside a visible box. For faces and plates, a tight lasso selection with a small feather usually looks the most natural; for backgrounds, the magic wand plus a larger feather blends a whole region at once.

A strong Gaussian blur is enough to hide a face or plate from a casual viewer, but it is a visual effect, not a guarantee — heavily blurred text or numbers can sometimes be reconstructed. If the information genuinely must be unrecoverable, such as an account number on a document photo, fill the selection solid with the bucket tool instead of blurring it. That replaces the pixels outright rather than smearing them.