Combine images into one file
Merge photos into a single image — side by side, stacked or in a grid — with gaps, background colour, rounded corners and drag-to-reorder.
- Runs in your browser
- Files are never uploaded
- Free, no account
Three ways to combine images
- Side by side. Images are laid out left to right and matched on height. Best for before-and-after pairs, comparisons and wide banners.
- Stacked. Top to bottom, matched on width. Best for joining screenshots of a long page, a chat thread or a receipt scanned in two halves.
- Grid. A fixed number of columns, each cell sized to the largest image. Best for contact sheets, collages and photo sets.
How the sizing options work
Photos are rarely the same size, and how you resolve that is the difference between a tidy montage and an obviously bodged one. The tool gives you three explicit choices rather than guessing:
| Setting | What happens | Use when |
|---|---|---|
| Keep every image at its own size | Nothing is scaled; shorter images are padded with the background colour and positioned by the alignment control | The images are already consistent, or you want the size difference to show |
| Scale all to the smallest | Everything is reduced to match the smallest image's height (or width) | The default for comparisons — no image is ever enlarged, so nothing goes soft |
| Scale all to the largest | Everything is enlarged to match the biggest | You need a specific output size and can accept upscaling on the small ones |
Scaling always preserves each image's aspect ratio, and uses a high-quality resample rather than a crude stretch, so a 4000 px photo dropped to match a 1200 px one still looks clean.
Gaps, colour and corners
A gap of 8–24 px in a contrasting colour is the simplest way to stop a montage reading as one confusing wide photograph. Set the background to white for print and documents, to your page colour for the web, or switch on transparency and export PNG when the montage will sit on an unknown background. Corner rounding is applied per image, clipping each photo to a rounded rectangle — 8–16 px looks contemporary, anything above 40 px starts to look like a sticker sheet.
Order matters, and you control it
The file chips above the preview are draggable. Order runs left to right for side-by-side, top to bottom for stacked, and row by row (left to right, then down) for the grid. Remove an image with the × on its chip; the canvas re-lays out immediately, and the pixel dimensions of the output are printed above the preview so you always know what you are about to download.
Why there is no file limit
Every other combiner has a cap — five images, ten megabytes, three jobs a day — because each job costs them bandwidth and CPU. Here the compositing is a canvas operation in your own browser, so the only ceiling is your device's memory. That said, memory is a real ceiling: a grid of twenty 12-megapixel photos produces a canvas of several hundred million pixels, which some mobile browsers will refuse to allocate. If that happens, cap the size of the inputs first with Resize Image and try again.
Choosing the export format
- PNG — lossless, keeps transparency, the right default for screenshots, diagrams and anything with text.
- JPG — much smaller for photographic montages; no transparency, so the background colour is always painted.
- WebP — smaller than JPG at the same quality and keeps transparency; the best option for the web when you control the audience's browser.
If the combined file needs to fit a size limit, follow up with compress to 1 MB, which shows you exactly which quality setting it chose.
Related tools
Merge Images Side by Side opens in the horizontal preset with comparison shots in mind, and Photo Collage Maker opens on a 2-column grid with gaps and rounded corners already set. To caption the finished montage, use Add Text to Image.
Questions
How many images can I combine?
As many as your device memory allows. There is no per-file or per-batch cap, because there is no server queue to protect — the canvas is built locally.
What happens when the images are different sizes?
You choose. “Keep every image at its own size” pads the shorter ones according to the alignment setting; “Scale all to the smallest” avoids any upscaling; “Scale all to the largest” makes everything match at the cost of enlarging the small ones.
Can I keep a transparent background?
Yes — switch on “Transparent background” and export as PNG or WebP. JPG has no alpha channel, so a JPG export always paints the background colour first.
Does the order of the files matter?
Yes, and you can change it: drag the file chips above the preview. Order runs left to right for side-by-side, top to bottom for stacked, and row by row for the grid.