Three ways to combine images
This tool joins 2 to 30 images into a single picture. The layout you pick depends on what you are making:
- Horizontal places images side by side in one row. Ideal for before-and-after comparisons, product variants or two screenshots you want to discuss together.
- Vertical stacks images in one column. Good for long chat screenshots, step-by-step instructions, or a tall image for a story or pin.
- Grid arranges images in rows with the number of columns you set. Use it for photo collages, mood boards, contact sheets or a quick overview of a product range.
Images appear in the order of the thumbnails, so drag them into place before you export.
Spacing, background and alignment
Spacing adds a gap in pixels between images. Zero gives a seamless join; 10–20 px looks clean for collages. The gap is filled with the background color.
Background color fills the gaps and any empty space left when images differ in size. White suits documents and printed collages, black works well for photos, and a brand color can tie a comparison graphic to your site.
Alignment decides where smaller images sit along the row or column:
| Layout | Start | Center | End |
|---|---|---|---|
| Horizontal | Top edges line up | Centered vertically | Bottom edges line up |
| Vertical | Left edges line up | Centered horizontally | Right edges line up |
For screenshots, start alignment usually looks tidiest. For photos of different heights, center is the most balanced.
Getting a clean result with mixed sizes
The tool doesn’t crop or stretch your images, so a tall portrait next to a wide landscape will leave background-colored space. To avoid that:
- Crop or resize images to the same height before a horizontal merge, or the same width before a vertical one.
- For grids, use images with the same aspect ratio, such as all square or all 4:3.
- If you can’t match sizes, pick a background color that blends with the images and use center alignment.
PNG or JPG output
| Output | Best for | Notes |
|---|---|---|
| PNG | Screenshots, diagrams, text, graphics | Lossless and crisp, larger files |
| JPG | Photos and collages | Much smaller, ideal for sharing and email |
Transparent areas of PNG or WebP inputs are drawn on the background color, so choose it with that in mind when you export to JPG.
Size limits and common issues
The merged image can be up to 16,000 pixels on its longest side. Stacking many full-resolution phone photos vertically adds up fast: ten 4,000-pixel-tall photos would reach 40,000 pixels, far over the limit. Use a grid instead of a single long column, resize the photos first, or split the set into two merges.
If the download seems slow or the page becomes unresponsive with 30 large images, your device may be running low on memory. Resize the photos first or merge them in smaller groups.