Combining several photos into one PDF

You have fifteen photographs and the person at the other end asked for a file. Attaching them one by one bloats the email, leaves the ordering to the recipient, and losing one of them along the way is entirely likely. The answer is to gather the images into a single PDF document.

The part nobody thinks about is the layout: does every photograph get a page of its own, or do two or four of them share one? That single decision sets how many pages the file has, how much paper it burns when printed, and how quickly a reader can scan through it.

Decide first: how many images per page?

The layout follows what the document is for. Contract pages and anything that will be signed always want a full page; the reader has to see the detail and may need to write on it. Small items such as expense receipts, shipping labels and site inspection photos, on the other hand, waste a whole sheet each.

The difference turns into a concrete number: twelve photographs at one per page make a twelve-page document, two per page make six, four per page make three. Same content, a quarter of the paper.

In other words this is an economic decision, not an aesthetic one. Who reads the document, will they work on it, will it be printed — answer those three and the layout picks itself.

Which document wants which layout?

The shape of the item makes the choice easy. Tall, narrow things keep their width when stacked two to a page; square or landscape ones fill a two-column grid without leaving gaps.

Sort out the order before you start

Images enter the document in the order you selected them, and that order cannot be corrected afterwards — a PDF built in the wrong sequence has to be made again. When you multi-select on a phone or a computer, the system usually sorts by name rather than by the time the picture was taken.

Here is the practical consequence: files named "photo (1)", "photo (10)", "photo (2)" do not arrive in the order you expect, because sorting compares letters rather than values and the digit 1 wins over 2. Naming the files 01, 02, 03 ends the problem completely.

If you are wondering where renaming happens: on a computer, right-click the file and choose Rename; on a phone, press and hold the file in the file manager and pick the same option from the menu that appears. When page order matters, remember to give the first photograph 01 — single digits need the leading zero too.

If the document will be printed

A document destined for paper needs real page dimensions; pages built to match each photograph's own proportions come out shrunk, enlarged or off-centre on the printer. That is why a fixed page grid is the safer choice for anything you will print: the page is produced at paper size from the start.

The second point is margins. No printer can put ink on the outermost few millimetres of a sheet; in a grid layout the cells already have padding around them, so nothing gets cut off at the edge. Borderless printing, which covers the whole sheet, needs special paper and printer settings — do not expect it from an ordinary office machine.

Finally, look at the last page before printing. If the number of images does not divide evenly into the layout, empty cells remain at the end; that is normal and prints as blank paper. If it bothers you, change the layout or add one more image.

Keeping the file size sensible

A PDF holding thirty phone photographs passes a hundred megabytes without effort and runs straight into the attachment limit of most email services. Getting an oversized file to the recipient means sending a cloud link instead, which adds a step at their end.

Shrinking the pictures before they go into the document is the easiest fix. Bringing the longest edge down to 1600 pixels with the Image Compression tool is more than enough for a receipt printed in a grid: the cell only gets half a page anyway, so extra resolution never reaches the paper but does occupy the file.

Think in terms of the real size of the cell. In a four-up grid a cell is roughly four inches wide; even printing that at 300 dots per inch calls for about 1200 pixels — a third of what the original photograph carries.

One picture, or a document with pages?

Some jobs do not need a PDF at all. If you want two photographs side by side to send in a message, or you are putting together a before-and-after comparison, a single image is more practical: messaging apps show a preview of it and nobody needs a document reader to open it. The Photo Merge tool does exactly that and hands back one picture file.

PDF is the right choice whenever the idea of a page matters: submitting paperwork, archiving, printing, formal applications. The rough rule — if it will be taken in at a glance on screen, make an image; if it will end up on paper or be read page by page, make a PDF.

Frequently asked questions

How do I combine several photos into one PDF?

Select all the images in one go, decide how many you want on each page and build the document. The photographs are placed in the order of the selection list, each as its own page or as a cell on a shared page.

How do I work out the page count in advance?

Divide the number of images by the images per page and round up. Fifteen pictures in a four-up layout make four pages, with one cell filled and three empty on the last one.

Why is the order not what I expected?

Multi-selection sorts by name, so "photo (10)" comes before "photo (2)". Renaming the files with a leading zero — 01, 02, 03 — puts them in the right sequence.

Is this free, and do my files get uploaded anywhere?

It is free and it runs entirely inside your browser. The photographs never leave your device and nothing is sent to a server; the document is built on the device itself.

Can I mix portrait and landscape photos in one document?

Yes. Each image is fitted into its place with its proportions intact and nothing is cropped. Mixed orientations leave some empty space, which does not affect readability.

Last updated: August 27, 2026