A house photo without the address visible
You're selling your car on a marketplace and you took the photos in your driveway. Great shots, but the license plate is right there, and so is your house number on the door behind it. You don't want strangers on the internet matching your registration to your home.
You drop the photo into the tool, switch to area mode, and drag a small rectangle over the plate. Then another over the house number. The blur applies live as you draw, so you can see exactly how unreadable each spot is before you save.
A few seconds later you download a clean PNG with both spots censored. The car still looks good, the listing goes up, and your address stays where it belongs.