Merge Images Online — Side by Side or Stacked
Combine two or more images into one, horizontally or vertically. For before/after shots and screenshots. No upload. No upload — runs 100% in your browser
or click to browse
How to use this tool
- Drop an image onto the box above.
- The tool processes it instantly, in your browser.
- Click Download to save the result (PNG, full quality).
How images are combined
Images are placed edge to edge in the order you dropped them, at full resolution — nothing is scaled. For a horizontal merge the output height is the tallest image; for a vertical stack the width is the widest. Smaller images sit on a white background in the leftover space. If you need every panel the same size, resize them to matching dimensions first with the resize tool, then merge.
Common uses
Before/after comparisons, side-by-side product shots, stitching screenshots of a long page (take overlapping captures, crop, then stack vertically), and combining scans of a document photographed in two parts.
Frequently Asked Questions
Are my files uploaded to a server?
No. Everything on this page runs inside your browser using JavaScript and WebAssembly. Your file never leaves your device — you can even disconnect from the internet after the page loads and the tool still works.
How many images can I merge?
As many as your device memory allows — a handful of phone photos is fine. Add them one at a time; the counter shows how many are loaded.
Can I control the order?
Images merge in the order you added them. If the order is wrong, reload the page and add them again in the right sequence.