How to Sign a Word Document on iPhone in 2025

Table of Contents

What’s New

H2 Example Intro

H2 Example o

TL;DR

Microsoft Word App: Lets you sign directly but requires a subscription and pre-saved signature.
Markup Tool: Free built-in iOS option to convert files to PDF and add a handwritten signature.
eSignature Apps (like Fill): Most convenient way—import documents, draw/type/upload your signature, and send securely with encryption and audit trails.
Legality: Digital signatures are legally valid under the ESIGN Act and other global e-signature laws.

‍

Signing a document online on your PC or MAC is relatively easy. You can use a digital signature app or sign with your mouse. But how to sign a word document on iPhone?

Signing documents on the go is where it gets tricky. Unlike signing a Word document on your computer, you will have to work harder to sign documents while using an iPhone. So in this article, we will walk you through how to sign a document on iPhone hassle-free.

Why Choose to Sign a Word Document on Your iPhone?

If you are someone who has a lot of things to attend to, having multiple tabs on your laptop can’t be enough. This is most especially relevant when there are urgent matters you have to attend to.

When we trip down memory lane, iPhones are invented to make your computer more accessible and convenient with a touchscreen interface. So for people on the go, using their iPhones is a no-brainer to get things done. Quickly and easily.

How to Sign a Word Document on Your iPhone

There are many ways to sign a word document on iPhone. You can use an app or the most convenient method for you. But if you don’t know which one to go for, here are some points to help.

How to Sign a Word Document on iPhone Using Microsoft Word App

A Word document is not a Word document without the Microsoft Software itself. But, here’s the thing: singing a Word document on your iPhone using Microsoft Software is not as easy as it would be on your laptop.

Here’s how you can sign a Word document on your iPhone using the Microsoft Word app:

Step 1. Download the app on the App Store.
Step 2. Sign in to your account and avail a subscription.
Step 3. Open the document that you need to sign.
Step 4. Click the ellipsis or … in the lower right corner.
Step 5. Click on the Home button in the pop-up.

Click the Home button to sign a Word document on iPhone using Word app

Step 6. Then, click on Insert, picture, and insert the electronic signature you already have.

Wait for the pop-up to click the Insert button

Can I sign on Word on iPhone?

The thing is, Microsoft Word on your laptop is easy. Yes, you can sign a document on an iPhone on Word. But you're probably looking for ways to sign a Word document on iPhone free way, so this is not it.

You might wonder how to sign a Word document on iPhone 11. The Microsoft Word app allows you to. But, you need to avail of a subscription and have an electronic signature ready. So it’s not fast and easy.

How to Sign a Word Document on iPhone with Markup

Your iPhone’s built-in Markup tool makes it possible to sign documents without downloading any extra apps. It’s quick, secure, and convenient for those moments when you need to sign something on the go. Follow these steps:

Step 1. Open the Word Document
Locate the Word file you need to sign—whether it’s saved in your Files app or attached to an email. Tap on the file to open it directly. If you’re using the Mail app, simply tap the attachment, and it will load in the document viewer. This ensures you’re working with the correct version before proceeding.

Step 2. Convert to PDF (if needed)
Markup doesn’t always work with Word files natively. If you don’t see the Markup option, tap the Share icon and select Print. From the preview screen, pinch outward on the document to convert it into a PDF. You can then save this new PDF copy in the Files app, making it compatible with Markup for signing.

Step 3. Access Markup Tools
Once the document is in PDF format, open it again in the Files app, Mail, or any other app that supports Markup. Look for the Markup icon (a pen tip inside a circle) or choose Markup from the share sheet options. This will launch the editing toolbar, giving you access to drawing, text, and signature tools.

Step 4. Add Your Signature
In the Markup toolbar, tap the + (Add) button and select Add Signature. Use your finger or Apple Pencil to write your signature directly on the screen. If you’ve saved a signature before, you can quickly reuse it for consistency. When you’re happy with the look of your signature, tap Done to confirm.

Step 5. Place and Adjust the Signature
Your signature will appear as a movable element on the document. Drag it to the correct location, usually at the end of the document where signatures are required. You can resize it by pulling the blue handles at the corners or adjust its color and line weight from the toolbar. This ensures your signature looks neat and professional.

Step 6. Save and Share
When everything looks good, tap Done in the top-right corner. The signed document is now ready to use. You can send it directly via Mail, Messages, or AirDrop, or save it back to Files for record-keeping. This way, you have a legally signed copy available for immediate sharing or secure storage.

How to Sign a Word Document on iPhone Using Fill App

Fill is a document-signing software that allows you to fulfill and send your documents anytime and anywhere. So what better way to make use of an iPhone than to fill it with apps that streamlines your work process?

Many people wonder how to sign a Word on iPhone, and not anyone knows Fill— the perfect solution to your need.

How to sign a Word document on iPhone using Fill

Step 1. Save the Word document you need to sign using Google Drive.
Step 2. Install the Fill app. You can look for it on the App Store or get it here.
Step 3. Click the + button to import from Google Drive. Sign in to your Google account and import the files you need to sign. If you wonder how to sign a Word document on iPhone from email, you simply have to save the file on Drive and import it into the Fill app.
Step 4. Choose Sign Yourself if you need to sign the document or Request Signature if other people need to sign the document. Then, click Fill and Sign Document.

Step 5. Click the Sign button on the bottom-most part of the screen. Upon clicking that button, you can choose whether to draw your signature, import an electronic signature, or type your name with three font styles and colors. Then, drag it on your document and adjust it accordingly. Here, you can add your handwritten signature on iPhone.

Fill app allows you to choose signature to sign a Word document on iPhone

Step 6. Once done, click Send in the upper right corner and click Continue. After which, you can download it as a PDF, send it as an email, or send it in a Fax using this digital fax software.

Why you should use Fill

There is a lot of document-signing software that you can choose from online. However, most, if not all of them, require you to access their premium plan first. On the other hand, Fill doesn’t necessarily need you to pay to get your documents over with.

Here are other benefits of Fill:

Feature / Tool	Fill	Word App	Markup (iPhone built-in)
Ease of Use	Dedicated e-signature platform with guided signing steps; no conversions needed.	Requires document editing; can be clunky on mobile.	Works easily with PDFs, but requires conversion for Word docs.
Legality & Compliance	Legally binding e-signatures compliant with ESIGN, eIDAS, and other global laws.	Limited—typed signatures may not meet legal standards.	Basic signature overlay, not always legally binding.
Security	Bank-grade encryption, audit trails, and tamper-proof records.	Minimal security; no audit trail.	No encryption or compliance features—basic annotation only.
Document Management	Cloud storage, version control, and integration with workflows.	Only saves within app or cloud drives; no workflow tools.	Saves signed files to Files app; no version control or tracking.
Collaboration	Supports multiple signers, role assignment, and real-time tracking.	Limited collaboration; manual sharing needed.	One-person signing only; manual file sharing required.
Cross-Platform Access	Works seamlessly on iOS, Android, desktop, and web.	Works on mobile and desktop, but not optimized for signatures.	iPhone/iPad only; limited to Apple ecosystem.
Extra Features	Templates, automated reminders, bulk sending, and integrations (Google Drive, Dropbox, etc.).	No e-signature extras; just document editing.	Purely annotation—no extras or automation.

Is it Legal to Sign a Word Document on Your iPhone?

With many businesses going digital in this time and age, signing a Word document, contracts, and any other legal documents online is already a part of the norm. It may be far from what most people are used to, but it doesn’t make it any less.

It has been up for debate in the United States for quite some time. But eventually, there is the ESIGN Act that ensures the acceptance of digital signatures. So, any documents signed electronically are not any less than documents signed traditionally.

If you use Fill in signing your documents, your documents will be extra secure with their end-to-end encryptions.

Key Takeaways

While it is perhaps easier to sign documents on your laptop or computer because that is what you are used to, signing documents using your iPhone is possible. It helps you get things done faster in just a few taps. Even more, you can send it just as quickly, too.

So, what are you waiting for? Don’t wonder how to sign a Word document on iPhone anymore. Because with Fill, you can sign your documents with a device that fits your pocket.

Get A Demo

Start For Free