How to Make a PDF From Multiple Photos in the Right Order
Your gallery app exports in capture order, which is why the pages come out backwards. Here is how to control the sequence instead of fighting it.
The order is set by the app, not by you
When you choose Share, then Make PDF from a gallery orPhotos app, the sequence is the one the app has already decided. Almost always that is capture order, or at best whatever its current sort happens to be. Selecting the photos does not reorder them, so if you picked them in a sensible sequence the export can still come out scrambled.
Nothing is broken. This is simply how those features are built: the order is an output of the app's own view of your library, not an input you control. The fix is to use a tool where adding each photo is what places it.
How to build the PDF in the order you want
- Add the first photo. Its position in the list is its position in the document, so there is nothing to reorder afterwards.
- Continue in the same sequence you want the reader to experience. If the order matters, read the pages as you go rather than adding the folder.
- Choose the page size before converting. Fitting to a standard page with margins is the safer default for printing; keeping each photo's own dimensions suits documents that stay on screen.
- Convert, then check the seam between the first and second photo. That is where an inverted sequence shows up.
A4 fit or original size, decided by what happens next
The page size choice is the single biggest lever on how the result looks. Fitting each photo to a standard page and centring it with white margins gives you something that prints cleanly on any home printer. Keeping each photo at its native pixel dimensions gives larger pages for larger photos, which is usually what you want for a document people will scroll rather than print.
The tradeoff is resolution. A photo fitted onto a standard page is scaled down, and a genuinely small photo scaled up will look soft on a large screen. Neither setting changes how much detail the file had to begin with, so if the source images are small, larger output pages will not add detail that was never captured.
Mixing photos from different cameras
Handled in one pass, and the page size setting is what keeps it tidy. Photos from different devices rarely share dimensions, so picking a consistent page size gives the combined file a uniform look, whereas keeping native sizes gives you pages of different sizes inside one document. For anything you intend to send to someone, consistent pages read better.
Which method should you use?
Speed
Browser tools skip the upload and download entirely, so merging takes about as long as your machine needs to write the file. Server-based tools add transfer time on both ends.
Privacy
Merged documents often end up being the complete package — a contract with all annexes, a full set of invoices. Keeping that on your device means there's no copy sitting on someone else's server afterwards.
Cost
Browser mergers and Preview are free. Paid desktop software earns its keep only when you need capabilities beyond merging, such as OCR or sophisticated form work.
Convenience
If merging is an occasional task, a bookmarked browser tool is hard to beat: no install, no login, works on a phone when someone emails you files while you're out.
Common questions
Why is my PDF in the wrong order?
The app that built it used its own sort order rather than the sequence you selected. A tool where each addition places the photo removes the problem.
Should I use A4 or the original photo size?
Choose A4 fitting if you will print. Choose original size if the document stays on screen and the photos are already high resolution.
Can I put several photos on one page?
Not with the image-to-PDF tool above; it builds one page per image. If you need a contact sheet, do that in an image editor first and convert the result.
Build your PDF in the order you want
No upload · No sign-up · No watermark · Runs in your browser
Open JPG to PDF →Also useful: Merge PDF · Split PDF · Rotate PDF · JPG to PDF · PDF to JPG