Three photos or thirty, one picture. The combiner lays them out in a grid, a row or a column, keeps every image whole unless you choose otherwise, and saves the result on this device.
Grid, row or column
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An image combiner, sometimes called a picture combiner, puts many separate images into one picture — a grid, a row or a column — so a whole set can be posted, sent or attached as a single file. This one keeps every image whole by default, accepts pasted screenshots, and builds the combined image in your browser without uploading anything.
The image combiner opens in a grid with Fit turned on, which means no image is cropped to fill its cell: anything that is a different shape sits inside its cell with a little background around it. Switch to Fill later if you want a tighter, edge-to-edge look and have checked what it trims.
How many images, which shape
When you combine multiple images into one, the number of images decides more about the result than any style setting. With Columns on Auto, the image combiner picks a grid from the count; you can override it with 2, 3 or 4 columns. This is what Auto does, and when to change it:
What the image combiner does with each count on Auto
Behaviour of this editor's Auto columns. An unfinished last row is centred.
Fewer columns make each image larger and the combined image taller; more columns do the opposite. For a feed viewed on a phone, three columns is the point where each image is still recognisable at a glance. Past about twelve images, every cell becomes a thumbnail, and two combined images will usually communicate more than one.
The same six images, three columns versus two. Column count changes both the cell size and the overall shape.
Output sizes for the places combined images go
Pick the shape first, then the width. Every platform crops or letterboxes an image that does not match its slot, so a combined image built at the wrong shape gets cut a second time after you post it. The grid's Aspect ratio control sets the shape of the whole combined image — 1:1, 4:5, 9:16 or 16:9 — and Max width sets the pixels.
Where combined images are posted, and the settings to use
Destination
What the platform says
Image combiner settings
Instagram feed
1080 px wide; ratios from 1.91:1 to 3:4 keep full resolution (1080 × 1080, 1080 × 1350, up to 1080 × 1440). Other ratios are cropped.
1:1 or 4:5, Max width 1200
Instagram Stories
9:16 at 1080 × 1920 (Meta's Stories ad spec; no separate figure for organic stories)
9:16, Max width 1200
X (Twitter)
Single images between 2:1 and 3:4 display in full. No recommended pixel size is published.
16:9 or 1:1, Max width 1200
Facebook feed
4:5 at 1440 × 1800 for feed ads; no current figure for ordinary posts
4:5, Max width 1200
Pinterest pin
2:3 at 1000 × 1500; pins taller than 2:3 may be cut off
4:5 (shorter than 2:3, so nothing is cut), Max width 1200
Etsy listing
At least 2,000 px on each side; first photo landscape or square
1:1, Max width 2000
Amazon listing
Longest side 500 to 10,000 px; 1,000 px or more enables zoom
Every setting in that table stays at or below 2,400 pixels on the long edge, so none of these exports count toward the free daily limit on full-size images. Exporting a little above the platform's width, such as 1200 for Instagram's 1080, is fine — the platform scales it down once — whereas exporting below it means the platform scales your combined image up and softens it.
One limit of the image combiner to know about: there is no 3:4 or 2:3 preset. For Instagram's tallest post or a full-length pin, 4:5 is the closest shape that will not be cropped.
The common output shapes side by side at the same height.
Paste, drop, reorder
There are four ways to get images into the image combiner, and you can mix them. Drop files onto the editor from a folder. Choose files to open the file picker, which on a phone also offers the photo library and the camera. And paste: copy a screenshot or an image from another app, click anywhere on this page, and press Ctrl+V (⌘+V on a Mac). Each paste adds one more image to the set, which makes building a combined image from a run of screenshots quick.
Order is set by the thumbnail strip: the first thumbnail is the top-left cell, and cells fill left to right, then down. Drag thumbnails to reorder them, or use the arrow buttons on each one to move it earlier or later — those buttons work from the keyboard too. Rotate anything that arrived sideways before you judge the layout, because one portrait image changes how its row looks.
Fit or Fill. Fit keeps each whole image inside its cell and pads the leftover space with the background colour. Fill scales each image to cover its cell and trims the overflow — tidier, and the only option that removes content. The difference is covered in more depth on Combine Images Online.
Checklist before you post a combined image
Combine photos in a hurry and the same few mistakes slip through. Run down this list before the image combiner's result goes anywhere public:
The order reads correctly. Look at the preview as a stranger would: top-left first, then across. If the sequence matters, number the images with labels.
Fill has not cut anything that matters. If you switched to Fill, check every cell for trimmed faces, prices, captions and product edges.
It is wide enough for the destination. Match Max width to the platform size above; for a 3 × 3 grid, each image gets about a third of that width.
The shape matches the slot. Use the grid's Aspect ratio control so the platform does not crop the combined image a second time.
The format suits the content. JPG for photos, PNG for screenshots and text, WebP for a smaller file where it is accepted.
Spacing is even and intentional. A gap of 8–16 px separates images cleanly; zero reads as one continuous picture.
The file name says what it is. Rename combined-image before downloading — it helps you, and it helps search engines if the image is published.
Image combiner — questions
How many images can the image combiner take?
There is no fixed limit. The practical ceiling is your device's memory, which is lower on phones. Readability drops faster than memory runs out: past about twelve images, splitting the set into two combined images usually works better.
Can I combine images without cropping?
Yes, and it is the default on this page. Fit keeps every image whole inside its grid cell. In a row, Equal height keeps every image whole; in a column, Equal width does. Only Fill crops.
Can I paste a screenshot straight in?
Yes. Copy a screenshot or image, click on this page and press Ctrl+V, or Command+V on a Mac. Each paste adds one image to the image combiner's set.
Does the image combiner work on iPhone and Android?
Yes. It runs in current mobile browsers. You can choose images from the photo library or take a photo, then save the combined image back to the device. Lower the maximum width if a large set is slow.
What size should a combined image be for Instagram?
For the feed, 1080 pixels wide: 1080 × 1080 for a square or 1080 × 1350 for 4:5 portrait, and Instagram keeps ratios up to 3:4 (1080 × 1440) uncropped. Set the grid's aspect ratio to 1:1 or 4:5 and Max width to 1200; Instagram scales it to 1080. For Stories, use 9:16.
Is anything uploaded?
No. The image combiner decodes, combines and exports images in your browser. Anonymous interface events, such as the chosen layout, are counted for analytics; image pixels and filenames never leave the device.
Can I combine images vertically instead?
Yes. In the image combiner, choose the Vertical layout to stack images in one column at an equal width, which suits screenshots and step-by-step sets. For long screenshot stacks, see Combine Images Vertically.