Four ways to compare
Side by side places the images next to each other. Slider stacks them so you can drag a divider across. Fade blends from one to the other. Difference highlights every pixel that changed in red and tells you what share of the image is different.
Images of different sizes
If the two images aren’t the same size, the second one is scaled to match the first so they line up. For the most accurate pixel comparison, use two images with the same dimensions, such as two screenshots of the same page.
Private by design
Your images are read by your browser and never uploaded anywhere, so it’s safe to compare screenshots of private documents or unreleased designs.