Your iPhone converts a JPG to PDF using the built-in Files app or a print-screen gesture. No extra software. You can turn one photo into a PDF or combine several JPGs into a single document, and the tools are already on the phone.

Using the Files App to Create a PDF

The Files app makes a PDF from one image or several. A single JPG becomes a one-page PDF that sits next to the original file. Multiple JPGs merge into one PDF. Both use the built-in Create PDF tool.

Converting a Single JPG to PDF

  1. Open the Files app and go to the folder that contains your JPG.
  2. Touch and hold the image file until a menu appears.
  3. Tap Quick Actions, then tap Create PDF.
  4. A new PDF with the same name appears in the same folder. The photo becomes one page.

Combining Multiple JPGs into One PDF

To merge several JPGs into one PDF, use selection mode.

  1. In the Files app, tap Select in the top right corner.
  2. Tap each JPG you want to include. Tap them in the order you want the pages to appear.
  3. Tap the More button, the three dots in the bottom toolbar.
  4. Tap Create PDF. The combined PDF saves in the same folder, with each JPG as one page.

To sort the images first, switch to list or grid view and rearrange them before selecting. The PDF follows the order shown on screen.

Moving Photos from the Photos App to Files

If your JPGs live in the Photos app, move them to Files before using Create PDF. It takes a few seconds.

  1. Open the Photos app and find the image or images you want to convert.
  2. Tap the Share icon, the box with an arrow.
  3. Choose Save to Files from the share sheet.
  4. Pick a destination folder in Files and tap Save.

Once the images are in Files, follow the steps above to create a PDF. This works for a single JPG or several.

The Print Screen Gesture for Creating a PDF

Use the print-screen gesture to convert a JPG to PDF directly from the Photos app. You skip Files entirely. It is the quickest way to save a picture as a PDF on iPhone.

  1. Open the Photos app and tap the image you want to convert.
  2. Tap the Share icon, then tap Print.
  3. A print screen appears. Spread two fingers apart on the image, like a reverse pinch.
  4. The screen turns into a PDF view. Share the PDF or save it to Files from the share options.

This gesture creates a PDF from one image. To combine several JPGs into one PDF, you would need to repeat the process for each image and merge the PDFs with another tool. For multiple JPGs, the Files app Create PDF method is more direct.

Controlling the Order of Pages in a Combined PDF

When you combine several JPGs with the Files app, the page order matches the order in which you selected the images. You control the final arrangement.

  • Tap images one by one. The first image you tap becomes page 1, the second becomes page 2, and so on.
  • To select all images at once, switch to list or grid view and sort by name, date, or size. Then tap Select All or drag a selection box.
  • Rename files so they sort alphabetically in the order you want, then select them all.

Check the order by opening the PDF after creation. If the order is wrong, delete the PDF and try again with a different selection sequence.

Managing File Size of the Resulting PDF

PDFs created from full-resolution JPGs can be large. Each photo becomes one page, and the full resolution is preserved. If file size matters, resize the JPGs before converting them.

  • Open the JPG in the built-in Photos editor and reduce its dimensions or quality before saving a copy.
  • Use the smaller version of the JPG when creating the PDF in Files.
  • The resulting PDF stays smaller and easier to share or email.

The Create PDF tool has no built-in compression option. Resizing the source images is the practical way to control the final file size.

Comparing the Two On-Phone Methods

Choose the method that fits the task. The Files app handles one or multiple JPGs and saves the PDF automatically, but images must be in Files first. The print-screen gesture works directly from the Photos app for a single image, but you share or save the PDF manually. For combining several JPGs into one PDF, use the Files app. For a quick single-image conversion without moving files, use the print-screen gesture.