๐Ÿ–‡๏ธ Image Merge

Image A

Image B

Choose two images, and this tool merges them side by side or stacked vertically into a single exported image. Adjust the gap between them too. Handy for making before/after comparisons or combining multiple screenshots into one image.

How to use

  1. Click each of the two boxes to select an image.
  2. Adjust the merge direction (side by side or stacked) and the gap between the images.
  3. Press "Merge" to see a preview, then "Download" to save it.

How the calculation works

Join two images side by side or one above the other into a single image, with an optional white gap between them. Images of different sizes are scaled down to match: to the smaller height when side by side, or the smaller width when stacked. Proportions are kept, so nothing is distorted. The result is saved as PNG. Handy for before-and-after comparisons or combining screenshots into one image.

Worked example

1200ร—800 and 800ร—600 side by side with an 8 px gap โ†’ matched to height 600: 900ร—600 and 800ร—600 โ†’ result: 900 + 8 + 800 = 1708 ร— 600 Stacked instead, they match width 800: 800 ร— (533 + 8 + 600) = 800ร—1141.

Things to be aware of

  • The larger image is scaled down to the smaller one, losing resolution. Similar-sized images give the best results.
  • For three or more images, merge the result with the next image, or use the Collage tool.
  • Processing happens in your browser; images are never uploaded.

FAQ

What happens if the two images are different sizes?

For side-by-side merges the height is matched to the smaller image; for stacked merges the width is matched โ€” the larger image is automatically scaled down before merging.

Can I merge three or more images?

No, the current version only supports merging two images.

Are my uploaded images sent to a server?

No, all processing happens entirely in your browser.