Image Aspect Ratio is a browser based tool for checking an image’s pixel dimensions and aspect ratio. Users can select, drop, or paste a photo to view its width, height, and exact ratio. Image data is read locally in the browser. The tool previews how an image fits or fills common frames, including square, portrait, story, and widescreen formats. Users can copy the reported ratio. The previews illustrate the difference between fitting an image without cropping and filling a frame with a centered crop. The calculator does not resize or crop image files; any adjustments must be made in an image editor. A typical workflow is to load a photo, check its dimensions and ratio, then compare it with a target frame before preparing it for a platform or layout. For example, a 6000 by 4000 pixel image has a 3:2 ratio. The tool can show how it fits in a square frame or how much of it remains visible when centered and cropped to fill one.