Image Merger

Combine two images into one — side by side or stacked — right in your browser.

First image

Second image

Combine

Gap between images px

How to Use This Merger

Pick two images, choose the layout (side by side or stacked), set an optional gap, and merge. The combined canvas is centered on the larger dimension.

Great for comparison shots, before/after edits and simple contact sheets.
Add a gap in pixels to separate the two images with a transparent space.
Everything runs locally — your images never leave your device.

Frequently Asked Questions

Are my images uploaded?

No. Merging happens entirely in your browser using the Canvas API. Nothing is transmitted anywhere.

What happens if the images are different sizes?

They keep their original sizes. In horizontal mode the smaller image is vertically centered; in vertical mode the narrower one is horizontally centered.

Can I merge more than two images?

Not with this tool — it combines exactly two. Repeat the merge with the output for more.

What format is the output?

PNG, which keeps full quality and transparency.

Practical Example

Merge a 400×600 portrait and a 300×500 landscape side by side with a 20 px gap:

Canvas width = 400 + 300 + 20 = 720 px
Canvas height = max(600, 500) = 600 px
Both images stay centered vertically within the 600 px canvas.

What Your Results Mean

Dimensions — the final canvas size after summing widths or heights plus the gap.
Alignment — smaller images are centered on the larger dimension.
PNG output — lossless, so no quality is lost in the merge.