mergeimages

MergeImages.app is a fast, free, browser-based tool that lets you easily merge multiple images into a single one — either horizontally or vertically. Whether you're making a quick collage, sharing before-and-after comparisons, or stitching together screenshots, MergeImages.app makes it effortless.

No sign-up, no software, no waiting — just upload, combine, and download in seconds.