How to Convert Photos to PDF on iPhone

You can convert photos to PDF on iPhone by choosing the photos, running an image-to-PDF conversion and saving the file. Choose a tool that converts on the device, so your pictures are not uploaded to a server. This guide explains how to prepare the photos, how to convert them, how to keep the file size small and what to check before you send the PDF.

Before you start

A good PDF starts with good photos. Take each page in even light, with the paper flat and the whole page in the frame. Crop out the table or floor around the edges. If a photo is blurry, take it again, because a PDF keeps every flaw.

Check the order of the pages before you convert. Most tools keep the order you select, so tap the pages in the order you want them to appear.

Step by step

1. Open the photos app you use for the conversion, or the PDF app that handles images.
2. Pick the image-to-PDF tool.
3. Select the photos in page order.
4. Convert them to one PDF file.
5. Check the preview, then save the PDF to a folder you can find again.

Keep the file on your iPhone or in the place you choose, and check that it opens before you send it.

Image format and quality

Photos from an iPhone are often saved in HEIC format. HEIC makes small files, but some services and older programs do not read it. JPG is the most widely accepted format for photos, and PNG is better for screenshots and text with sharp edges.

Quality and size work against each other. A high-quality JPG is larger than a low-quality one. For a receipt or a form, a moderate quality setting is usually enough to read the text. For a photo album, keep the original quality.

Compression makes a file smaller and removes some detail. Keep an original copy of any document that matters, so you can recreate the file if you need more detail later.

Merge and compress after conversion

Many people end up with several PDFs for one job. Merging them into one file keeps the pages together. Check the page order after merging, because a second file can be placed at the wrong position.

Compression is the second step. Image compression reduces the size of the photos inside the file. PDF compression reduces the whole document. Use the lightest setting that keeps the text readable.

Scanning a page in the app

Some apps let you scan a page directly with the camera. Place the paper on a dark, flat surface, keep the phone parallel to the page and wait for the edges to be detected. Scanning gives a cleaner result than a casual photo, and it is useful for forms and contracts.

Privacy when you convert

Documents often hold personal data, such as names, addresses and account numbers. Before you use any converter, check where the files go. A converter that works on the device keeps your photos on your iPhone during the conversion. A cloud converter sends them to a server, which adds a copy you do not control.

How Calm PDF does it

Calm PDF is a PDF and image toolkit. It converts photos and images to PDF on your iPhone, and no file is uploaded. The free version includes image-to-PDF conversion, PDF merging, image compression, PDF to JPG or PNG export and a PDF reader with annotations. You do not need an account.

Some tools need the Pro upgrade. These include PDF compression, HEIC and HEIF conversion, OCR text extraction, searchable PDFs and unlimited bulk conversions. The free version allows two bulk conversions a day. The app page lists the full set: Calm PDF Image Toolkit.

If you want to convert your next receipt or form, try the Calm PDF app page. For more tools, see the apps page.

Frequently asked questions

Can I convert several photos into one PDF?

Yes. Select the photos in the order you want, convert them together and you get one PDF with one page for each image. Check the order in the preview before you save.

Why is my PDF so large?

Large photos at high quality make large files. Compress the images, or use a lower quality setting for documents that only need to be read. Keep the original photos in case you need more detail later.

Is it safe to convert personal documents on my iPhone?

It is safer when the conversion runs on the device and nothing is uploaded. Check the privacy statement of the app you use. Calm PDF processes files on your iPhone and does not create an account.

What is the difference between PDF and JPG?

A JPG is one image. A PDF can hold many pages, keeps their order and opens the same way on most devices. Use a PDF when you send several pages as one document.