OverlayImage is a simple yet powerful browser-based image overlay editor for combining multiple images without installing software. You can drag and drop images, arrange them as editable layers, adjust position and size, control opacity from 0–100%, and apply blend modes like Normal, Multiply, Screen, and Overlay. It also supports real-time preview, automatic canvas adjustment, and high-quality PNG export.

Because all processing happens locally in the browser, OverlayImage keeps image editing fast and private without requiring server uploads. It supports common image formats including JPG, JPEG, PNG, GIF, WebP, and BMP, works on both desktop and mobile devices, and is useful for watermarking, product image editing, social media creatives, photo collages, ID photo composition, and presentation materials. The site is completely free to use, does not require registration, and exports images without adding a watermark.