How to combine multiple photos into one PDF on iPhone
To merge several photos into one PDF on an iPhone, convert them in a single pass rather than one at a time: select them all in the Files app and choose Create PDF, or use a converter that lets you set the page order first. The merging is easy - keeping the pages in the right order and the file small is the part worth getting right.
The short answer
Select every image in one go and convert them in a single pass - that is what makes one file with several pages rather than several files with one page each. In the Files app, select all the images, long-press and choose Create PDF. In a converter app, select them, drag them into order, and build.
The part that trips people up is not the merging. It is the order.
Why the page order goes wrong
iOS does not ask you what order you want. It uses whatever order the folder is sorted in - file name, or date added. Camera file names are sequential, so photos taken in one sitting usually come out right.
They come out wrong as soon as reality intervenes: you re-took page 4 because your thumb was in it, so page 4 now has the newest timestamp and lands at the end. You took pages 1–3 yesterday and the rest this morning. Someone AirDropped you two of the pages. In every one of those cases the automatic order is not your order, and there is no way to fix it after the PDF exists - you delete it and start again.
Method 1 - Files app, several images at once
- Save all the photos to one folder in Files (Photos › select › Share › Save to Files).
- Open the folder and tap Select, then tap each image in the order you want them - though note that Files will still apply its own sort when it builds the file.
- Tap the … button and choose Create PDF.
You get one multi-page PDF. If the sequence came out wrong, the practical fix is to rename the files
01, 02, 03 and so on, set the folder to sort by name, and convert
again. It works, but renaming ten files by hand on a phone keyboard is its own punishment.
Method 2 - A converter that lets you set the order
The alternative is to choose the order visually before anything is built. In JPG To PDF Converter PRO:
- Tap JPG to PDF and pick every photo that belongs in the document.
- The selection appears as a grid. Remove strays with the × on each thumbnail and arrange the rest so they read top-left to bottom-right, which is the order the pages will come out in.
- Set the page size - A4, Letter or Legal - plus orientation and margins, so all the pages are uniform even though the photos were not.
- Preview the result page by page, then save or share it as one file.
Getting all the pages to look the same
A pile of camera photos is rarely consistent: one is landscape because you turned the phone, one is closer than the rest, one has a different white balance because you moved to the window. Converting them without a fixed page size preserves every one of those differences, and the finished document looks like what it is - a stack of snapshots.
Setting one page size for the whole document fixes most of it. Every image is fitted to the same page, so the pages are uniform even when the photos were not. Portrait suits paper documents; landscape suits whiteboards, spreadsheets and anything wider than it is tall.
When the file comes out too big
Modern iPhone photos are several megabytes each. Twelve of them can make a PDF too large for a mail attachment or an upload limit. Three things help, in order of how much difference they make:
- Drop the quality setting. Medium is usually indistinguishable from high for a page of text and produces a far smaller file. Low is fine for rough drafts.
- Remove the pages you do not need. The blurry retake, the accidental shot of the table.
- Crop before converting. Cropping in Photos to just the sheet of paper removes the desk, the floor and your hand - often a third of the pixels.
Tips
- Photograph in order. Two minutes of care at the camera saves ten minutes of reordering later.
- Include a cover page if it helps the reader. A photo of a handwritten title sheet makes a stack of scans much easier to file at the other end.
- Check the last page. It is the one most often missing, because the retake landed somewhere else in the sort order.
- Name the file meaningfully before you send it. Lease-signed-pages.pdf gets found again; IMG_4471.pdf does not.
Common mistakes
- Converting each photo separately and attaching ten PDFs. This is the single most common version of this mistake, and it is what the request for "one PDF" was trying to prevent.
- Not looking at the preview. Wrong order, an upside-down page and a duplicate are all obvious in preview and invisible in a file list.
- Mixing portrait and landscape without picking a page size. The reader ends up rotating their screen halfway through.
- Sending the full-resolution version to a portal with an upload cap. Check the size before you queue a large upload on mobile data.