Combine images in one file
Merging images means joining several pictures into one file: screenshots of a long chat or web page, the pages of a scanned document, a series of product photos, or the steps of a tutorial. Sending one tall image is easier than sending ten separate ones, and it keeps them in the right order.
This tool stacks your images vertically (top to bottom) or horizontally (left to right). It reads JPG, PNG, WebP, AVIF, GIF (first frame), BMP, SVG and iPhone HEIC files, and you can mix formats in the same merge. The list on the right shows the order: move an image up or down with the arrows, remove one with the cross, or add more at any time. The preview and the final size in pixels update as you go.
How sizes are matched
Images rarely share the same size, so you choose how they line up:
| Image sizes | What happens | Best for |
|---|---|---|
| Match the smallest | Every image is scaled to the narrowest width (vertical) or the shortest height (horizontal). Nothing is enlarged. | Photos and screenshots from different devices |
| Match the largest | Every image is scaled to the widest width (vertical) or the tallest height (horizontal); smaller images are enlarged and may look softer. | When one image must keep its full resolution |
| Keep original sizes | No resizing at all. Narrower images are aligned left, center or right (top, center or bottom in horizontal mode) on the background color. | Scans and screenshots that are already the same size |
Proportions are always kept: nothing is stretched or cropped. Browsers cap how big a canvas can be, so a very large merge is scaled down as a whole to stay within 16,384 px on the long side and 50 million pixels in total; the size line under the preview says when that happens. For a long strip of phone screenshots, about six screenshots fit at full resolution (a 1080 × 2400 screenshot is 2,400 px tall); more are shrunk to fit.
Spacing, background and format
“Space between images” and “Outer border” are set in pixels (0 to 200), and both use the background color, which is white by default. Pick black for a gallery look, or any color from the picker.
Save as JPG for photos: the file is much smaller and every app accepts it. Save as PNG for screenshots, text and graphics, which stay sharp because PNG is lossless. The canvas is filled with the background color before the images are drawn, so transparent areas of your images show that color in both formats.
Merge, side by side or split?
- To put just two or three photos next to each other at the same height, with spacing in percent, use Side by Side Photos. Our guide How to put two photos side by side covers phone and desktop methods too.
- The opposite job — cutting one big image into equal pieces — is done by the Image Splitter.
- A long merged JPG can be heavy; shrink it with Compress Image before emailing it.
Private by design
There is no upload step. Your images are read and drawn on a canvas inside the page, and the site’s security policy only lets the page talk to its own server. The merged file is created from pixels only, so EXIF metadata from the originals, such as GPS location, is not copied into it.