Drop two images to compare them four ways: side by side, with a slider you drag across, as an overlay with adjustable opacity, or as a difference map that marks every changed pixel in magenta and tells you what share of the image changed.
It is useful for checking screenshots, design revisions and visual regressions. Images are opened in your browser and never uploaded.
PNG, JPEG, GIF, WebP, AVIF, BMP, SVG and ICO, or anything else your browser can display.
They are lined up at the top-left corner, and the size difference is shown above the images.
Not to compare it. The comparison runs entirely in your browser, and the text you paste and the files you open are never sent to a server for that. There are no ads. The site counts visits with Google Analytics, which sees which page you opened, and keeps its own anonymous tally of what kind of comparisons are made (for example “a Word file, about 500 lines”), but neither ever sees the text you compare. If you copy a share link, the text is packed into the link itself, in the part after the # that is never sent to a server or to analytics. Your history and saves stay in your browser unless you sign in. If you do, they are uploaded to your account, but only after they are encrypted in your browser with a passphrase only you know, so nobody else can read them. The site stores your email address and that encrypted data, and can see how much you have saved but not what it says.