How to Sign PDF on iPhone 13: A Step-by-Step Guide


Ted Stinson

Signing a PDF on your iPhone 13 is a breeze. All you need is the built-in Markup tool in the Mail app or the Files app. With a few taps, you can add your signature to any PDF document on the go. No more printing, signing, and scanning back documents!

Step by Step Tutorial: How to Sign PDF on iPhone 13

Before we dive into the steps, it’s important to know that by following this tutorial, you will be able to electronically sign PDF documents directly from your iPhone 13. This is particularly useful for signing contracts, agreements, or any official documents that may need your signature.

Step 1: Open the PDF document

Open the PDF document that you need to sign. You can do this either through the Mail app or by locating the PDF in the Files app.

When you open the PDF from the Mail app, you’ll see an option for Markup at the bottom right corner of the screen. If you’re opening it from the Files app, tap on the document, and then look for the Markup icon, which looks like a pen tip.

Step 2: Tap on the Markup icon

Once the document is open, tap on the Markup icon to enter editing mode.

In editing mode, you can draw, add text, magnify, and most importantly, add your signature to the document.

Step 3: Add or create your signature

Tap on the ‘+’ button at the bottom right of the screen to add or create your signature.

If you have already added a signature before, it will appear here, and you can just tap on it to insert it into the document. If not, you’ll need to create a new one by selecting "Signature" and then using your finger or a stylus to write your signature on the screen.

Step 4: Position and resize your signature

Once your signature is on the document, you can move it around by dragging it with your finger. You can also resize it by pinching in or out.

Make sure to position your signature exactly where you want it on the document and that it’s the correct size to match the context of the document.

Step 5: Save the signed PDF

After you have placed your signature, tap "Done" at the top left corner of the screen to exit the Markup mode.

You will then be prompted to save the signed PDF. You can save it as a new file or replace the original document. Once saved, you can share the signed document via email or any other means as needed.

After completing these steps, you will have a signed PDF saved on your iPhone 13. You can send this document to anyone, anywhere, secure in the knowledge that your signature is clear and legally binding.

Tips: How to Sign PDF on iPhone 13

  • Make sure your signature is clear and resembles the one you usually use on paper for consistency and legal purposes.
  • If you make a mistake while creating your signature, tap "Clear" to start over.
  • You can add multiple signatures or initials by repeating steps 3 and 4.
  • Use a stylus for a more accurate signature if you find it difficult to sign using your finger.
  • Always review your signed document before sending it to ensure everything looks correct.

Frequently Asked Questions

How do I save a copy of the signed PDF?

After signing, when you tap "Done," you’ll be given an option to save the document. Choose "Save File To…" to save a copy to your preferred location in the Files app.

Can I use a photo of my signature instead of drawing one?

Yes, you can add a photo of your signature by tapping the ‘+’ button and selecting "Image." However, for best results and security, it’s recommended to draw your signature directly within the app.

What if I need to sign multiple pages within the PDF?

You can navigate to each page needing a signature and repeat the steps to add your signature. Each signature will need to be placed individually on the necessary pages.

Is an electronic signature on iPhone 13 legally binding?

Yes, electronic signatures are legally binding in many countries, including the United States. However, always check the laws in your specific country or region.

Can I remove or edit my signature after saving the PDF?

Once you’ve saved the document, you can’t edit or remove the signature through the Markup tool. You would need to revert to the original document and start the process over if changes are needed.


  1. Open the PDF document in Mail or Files app.
  2. Tap on the Markup icon.
  3. Add or create your signature.
  4. Position and resize your signature.
  5. Save the signed PDF.


Signing a PDF on your iPhone 13 is not only easy but also incredibly convenient. Gone are the days of needing a printer, scanner, or even a pen to sign important documents. With your iPhone 13 in hand, you can sign PDFs anytime and anywhere. Whether you’re finalizing a deal, giving permission, or acknowledging receipt, your signature is just a few taps away. Remember, the key to a successful digital signature is ensuring it’s clear, placed correctly, and saved securely. With the tips and FAQs covered here, you should be able to tackle electronic signing with confidence. Give it a try next time you need to sign a document – your iPhone 13 is more powerful than you might think, and it’s ready to make your life just a bit easier.