Overlay two images in your browser and wipe between them with a divider you can drag left/right (or up/down) — a classic before/after comparison slider. In an AI image workflow it's perfect for comparing before/after an upscale, a color correction, or an inpaint edit, all aligned in the same place. Load image A (before) and image B (after); the tool draws A over B and reveals A only on the near side of the divider. Drag the slider, or drag/click directly on the image, to move the divider and instantly see how the two differ along the seam. Choose the divider orientation — Left / right (a vertical divider) or Top / bottom (a horizontal divider) — and turn Labels on to burn before / after captions into the image. If the two images differ in size, B is scaled to A's size before overlaying. The comparison you see (divider line and labels included) can be saved as a PNG at the current divider position, so you can export a ready-to-post before/after image for social media or an article. Processing is capped at 2048px on the long side to stay responsive. All computation and drawing happen in your browser — the images are never sent to any server or API.