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

Signing a PDF on an iPhone is a straightforward process that can be accomplished without the need for any third-party apps. Simply open the PDF document, tap the markup icon, and use the signature tool to add your signature. After saving the document, your signed PDF is ready to be shared or stored.

After completing this process, the PDF will be stored on your iPhone with your signature saved. You can then share this document via email, messaging apps, or upload it to cloud storage services for easy access from other devices.


In this digital age, the ability to sign documents quickly and securely is more important than ever. Whether you’re finalizing a contract, approving a proposal, or acknowledging receipt of information, e-signatures have become a staple in business and personal transactions. Now, if you’re an iPhone user, you’re in luck – your device has a built-in feature that allows you to sign PDFs directly from your phone. This is not only convenient but also saves time, paper, and the hassle of printing, signing, and scanning documents.

If you’ve ever found yourself in a situation where you need to sign a document but don’t have access to a printer or scanner, you’ll appreciate the simplicity and efficiency of signing PDFs on your iPhone. No longer do you have to hunt down a printer or wait until you’re back at the office to handle important paperwork. As an authority on the topic, I’m here to guide you through the process, so you can sign PDFs from anywhere, at any time. This is a skill that’s relevant to virtually anyone – from business professionals to students, or anyone who needs to sign a document on the go.

How to Sign a PDF on iPhone Tutorial

This tutorial will take you through the steps to add your signature to a PDF document using the Markup tool on your iPhone. By the end of this guide, you’ll be able to sign your PDFs with ease.

Step 1: Open the PDF Document

Open the PDF you need to sign in the Files app on your iPhone.

Many PDFs come through email or are downloaded from the internet. You can open these directly from their location by tapping on them. If your PDF is in an email, download the file, and it will automatically save to your Files app under the “Downloads” folder.

Step 2: Tap the Markup Icon

Once the PDF is open, look for the pen tip icon, which is the Markup tool, and tap it.

This icon may be located at the bottom of the screen or in the upper-right corner, depending on your iOS version. By tapping this icon, you activate the editing mode, which allows you to make changes directly to the PDF.

Step 3: Use the Signature Tool

In the Markup toolbar, select the signature tool, which looks like a pen tip with a loop.

The signature tool is designed for creating and adding signatures. If you’ve never used it before, you’ll create a new signature by signing your name with your finger or stylus on the screen.

Step 4: Add Your Signature

With the signature tool selected, sign your name on the line that appears, then tap “Done.”

Your signature will now appear on the PDF. You can move it around and resize it by dragging and pinching to position it exactly where you need it on the document.

Step 5: Save the Signed PDF

After placing your signature, tap “Done” again, and the signed PDF will be saved automatically.

You’ll find the signed document in the same location where you initially opened the PDF. You can now share or store the signed PDF as needed.


ConvenienceSigning a PDF on an iPhone means you can deal with important documents on the go, without being tied to a printer or scanner.
Saves TimeThe process is quick and takes just a few taps, saving you valuable time compared to traditional methods of signing documents.
Eco-FriendlyBy signing digitally, you’re saving paper and contributing to a more sustainable way of handling documents.


Limited to Apple DevicesThis particular method is specific to iPhones, so those using other devices will need to find alternative methods.
Requires Updated SoftwareTo use the Markup tool, your iPhone must be running a relatively recent version of iOS, which may not be the case for all users.
May Not Be Accepted EverywhereSome institutions or organizations may still require a traditional handwritten signature on paper, so it’s important to confirm ahead of time.

Additional Information

While signing a PDF on an iPhone is incredibly convenient, there are a few additional tips and insights you should be aware of. First, make sure that the PDF you’re signing is the final version, as edits made after signing can invalidate your signature. Also, be aware of the security of your signed PDFs. If you’re signing sensitive documents, ensure you’re sharing them through secure channels.

Remember to keep a backup of your signed PDFs. Cloud storage services like iCloud, Dropbox, or Google Drive are great for keeping your important documents accessible and safe. Another thing to consider is the clarity of your signature on the screen. If your finger is too clumsy for a clear signature, consider investing in a stylus for more precision.

When it comes to legality, electronic signatures are generally accepted for most documents. However, as mentioned earlier, some documents may still require a wet signature, or physical pen on paper. Always check the requirements for your specific situation.

Lastly, don’t forget to use the prompt keyword – signing a PDF on an iPhone – once in this section.


  1. Open the PDF document in the Files app.
  2. Tap the Markup icon to enter editing mode.
  3. Select the signature tool from the Markup toolbar.
  4. Sign your name on the screen and tap “Done.”
  5. Save the signed PDF by tapping “Done” again.

Frequently Asked Questions

Can I save my signature for future use?

Yes, once you create a signature in Markup, it gets saved for future use. You can select it from saved signatures next time you need to sign a document.

Is a digital signature legally binding?

In many cases, yes. Digital signatures are legally binding in most personal and business transactions, but it’s always best to confirm the specifics for your situation.

Can I use this method to sign Word documents or other file types?

The built-in Markup tool is designed for PDFs. For other file types, you may need to convert them to PDF first or use third-party apps that support signing different file formats.

What if I don’t have the Markup tool on my iPhone?

Ensure your device is updated to the latest iOS version. The Markup tool should be included in iOS versions 10 and later.

Can I add the date or other text along with my signature?

Absolutely! The Markup tool also includes text and date options. Simply select the text tool after adding your signature and place it where needed.


In conclusion, signing a PDF on an iPhone is a game-changer for those of us constantly on the move. Gone are the days of printing, scanning, and mailing signed documents. With just a few taps, your signature can be added to any PDF, making your workflow more efficient and environmentally friendly.

Remember to ensure the security of your signed documents and to check if digital signatures are accepted for your specific needs. Now that you know how to sign a PDF on an iPhone, you can handle contracts, agreements, and other important documents with ease and confidence.