Combine images into a PDF
Put your photos in the order you want, pick a page size, and save them as one PDF. The original file names and the camera data are not written into the PDF, and nothing is uploaded — the file is built in this browser tab.
Images to PDF editor
Pick at least 2 photos to put in the PDF.
Page order
0 photos
Drag the handle, or use the Up and Down buttons, to change the order. Ctrl+Z (Cmd+Z on a Mac) undoes the last change.
When one PDF is what the other side asked for
A PDF turns a pile of photos into one attachment with the order locked in. That is usually why people end up here. An expense claim wants every receipt in a single file. A landlord, an insurer or a school office says "send it as a PDF" and will not take four separate photos. A two-page contract or a set of ID documents has to arrive as one thing, in the right order. A job or visa application asks for scans of certificates and gives you one upload box.
Printing is the other reason. Print several image files and every program lays them out differently — one per sheet, two per sheet, cropped to fill. A PDF already has its pages decided, so what you see when you page through it is what comes out. The final size on paper still depends on your printer's own scaling settings, so check the print preview.
Fit to photo, or A4: what actually changes
Neither setting ever crops your photo. The difference is what happens to the space around it.
Fit the page to the photo makes every page exactly as big as the image, plus the margin you chose. Nothing is scaled and no white space appears anywhere except the margin. The catch is the page size that comes out. Pixels are converted at 96 per inch, so a photo 794px wide gives a page 210mm across — the same width as A4 — while a 4,000px-wide phone photo gives a page about 1,058mm (42in) across. On screen that is invisible; the PDF just scales to your window. Send it to a printer and the printer shrinks that oversized page to fit the paper, which is why your careful 10mm margin comes out as something else.
A4 fixes every page at 210×297mm, then shrinks the photo to fit inside the margin and centres it. Because a photo's proportions rarely match A4's, the leftover space becomes white — a tall photo gets bands at the left and right, a wide one gets bands top and bottom. Pick this one if the file is going to be printed or if the form expects a standard page.
A4 is the only fixed size here — there is no US Letter option. A4 is 210×297mm; Letter is 216×279mm, wider and shorter. Printing an A4 page on Letter paper with "fit to page" turned on shrinks it slightly and leaves a strip of white down each side. If that matters, load A4 paper or set your printer to A4.
Page orientation is decided per photo, not for the document: a photo wider than it is tall gets a landscape page, everything else gets a portrait page. Mix the two and the PDF flips orientation as you page through it. The Rotate button turns a photo 90° at a time and the PDF is built from the rotated version, so use it before you download rather than after.
Where people get caught out
30 photos always fit
There is a second limit on the total pixels. The count stops at 30, but the photos together cannot pass 40 megapixels. A modern phone shoots around 4,000×3,000, which is 12 megapixels each, so the fourth one is refused. To get anywhere near 30 pages, each photo has to be about 1.3 megapixels — roughly 1,300×1,000. If you are combining full-size photos, run them through Shrink a photo first and come back.
A transparent PNG stays transparent
Transparency comes out white. Every photo is re-saved as a JPEG on the way into the PDF, and JPEG has no transparency. A cut-out with the background removed arrives with plain white where the background was. There is no setting for this, so if you need the transparency, this is not the tool for that step.
The file names and dates travel with it
The original file names are not in the PDF. The numbered names you see in the list are only for arranging the pages here. The document properties are written as fixed values too, including the creation date, so the capture time and location in the originals do not leak out through them. The flip side: nothing inside the PDF records when you actually made it. If a form needs a date, it has to be visible in the photo itself.
One more thing worth knowing before you send the file on: each page is stored as a JPEG at high quality rather than as your untouched original, so fine text in a document photo can soften a little. Zoom in on the smallest print in the PDF before you attach it.