Skip to content
FileBelow

Merge images into one

Side by side, stacked or in a grid. Nothing gets stretched to fit.

or drag them here

JPG, PNG, WebP, HEIC, AVIF and BMP. Your files are processed on your device.

How do I merge images into one?

To merge images, add two or more below and choose an arrangement. In a row every image is scaled to a common height and in a column to a common width, each keeping its own proportions — nothing is stretched to match its neighbour and nothing is cropped to fill a cell.

Three arrangements, and what each is for

Side by side is the comparison: before and after, two options, two versions of the same thing. Every image is brought to a common height, so the row reads as one picture rather than as a collision of sizes.

Stacked is the long screenshot. A conversation, a receipt, a settings page that would not fit on one screen — captured in pieces and joined back into a single tall image that can be sent as one file. Images are brought to a common width, which is what makes the seams line up.

Grid is the contact sheet: four, six or nine pictures in rows and columns. Each one is fitted inside its own square cell rather than cropped to fill it, so a mix of portrait and landscape shots stays intact and the background shows around them.

Nothing is stretched, and nothing is cropped

This sounds like a small detail and it is the whole reason to use one tool over another. The obvious way to combine images of different sizes is to force each one into an identical rectangle, and it is the wrong way: faces get subtly wider, screenshots get squashed, and the person looking at the result knows something is off without being able to say what.

So each image keeps its aspect ratio exactly. In a row that means the widths come out different, which is correct — a panorama beside a portrait should be wider. In a grid it means some cells have background showing at the sides and others at the top and bottom.

The size of what comes out

A merged image is roughly the sum of its parts, and six phone photographs make one very large picture. If the result is going anywhere with a limit — an email, a forum, an upload form — set a maximum file size before you press the button. FileBelow will compose the sheet and then find the best-quality encode that fits underneath your number, in a single pass rather than by compressing the result afterwards.

The gap setting also affects this more than you would expect: a flat background colour compresses to almost nothing, so generous gaps cost very little. Detail costs bytes; empty space does not.

What to do with the result

A combined sheet is often a step rather than the destination. If it is going somewhere with a limit, the compressor takes the number; if the shape is wrong for where it is going, padding it out reaches a required ratio without cropping anything you just carefully arranged.

If the recipient actually wanted a document rather than a picture, the PDF tool takes the same files and produces one page each — which is usually what "send them as one file" means when the request comes from an office. And if the sheet is going to be published, marking it and stripping its metadata are the two steps people forget.

Nothing leaves your device

Combining images is something people do with screenshots of private conversations, photographs of documents, and pictures of their children. Every one of those files is opened, decoded, composed and encoded in your browser. There is no server here that could receive them — the site is static — which you can confirm in your browser’s network tab, or by disconnecting after this page has loaded and using the tool anyway.

Common questions

Will my images be stretched to match each other?
No, and that is the main thing this tool gets right. In a row every image is scaled to the same height and keeps its own width; in a column, the same width and its own height. Nothing is squashed and nothing is cropped. Tools that force every input into an identical rectangle distort faces and squash screenshots, and there is usually no setting to turn it off.
Why did my large image get smaller when I merged it?
Because the images are matched to the smallest one rather than the largest. Scaling a 600-pixel image up to sit beside a 4000-pixel one produces a visibly soft half of the result; scaling the big one down loses detail nobody would have seen at the combined size anyway. Matching downwards is the choice that keeps the whole sheet looking consistent.
How many images can I combine?
Up to thirty. Beyond that the canvas gets large enough that browsers on phones start failing to allocate it, and a tool that accepts a request it cannot complete is worse than one with a stated limit. If a row of images would exceed what your device can draw, the plan is scaled down proportionally rather than dropping any of them.
Can I have a transparent background between them?
Yes. Choose Transparent and the output becomes a PNG, since JPEG cannot store transparency. The gaps then show whatever the image is placed on, which is what you want for a strip of logos going into a design and not what you want for something being uploaded to a form.
Is this the right tool for a before-and-after comparison?
Yes — side by side with a small gap is exactly that, and it is the most common use. Add the "before" first and the "after" second; the order in the list is the order in the result, and the arrow buttons move them around.