How to add a signature in Word

There are three things people usually mean by “adding a signature in Word”: putting an image of their handwritten signature into the document, adding a line where someone will sign the printout, or signing the file digitally. Here is how to do each — on Windows, on a Mac and on your phone.

Method 1. Insert your handwritten signature as an image

Use this when you need to sign a contract or a form and send the file back. You need an image of your signature — ideally a PNG with a transparent background, so it sits on the line without covering the text with a white box.

1. Click near the signature line and choose Insert → Pictures → This Device (on a Mac: Insert → Pictures → Picture from File). Pick your signature file.
2. Select the image, click the Layout Options icon next to it (or Picture Format → Wrap Text) and choose In Front of Text. Now you can move it freely over the line.
3. Resize it from a corner handle so the proportions stay right, and drag it into place.
4. Save. If you are sending the file to someone else, also save a copy as PDF (File → Save As → PDF) — the signature will not shift when they open it on a different computer.

If your signature has a white background, Word can remove it: select the picture, then Picture Format → Color → Set Transparent Color, and click the white area. It works well on a clean scan, less so on a photo with shadows.

To reuse it, type your name and title under the signature, select both and save them as AutoText: Insert → Quick Parts → AutoText → Save Selection to AutoText Gallery (on a Mac: Insert → AutoText → New). Next time the whole block goes in with a couple of clicks.

Method 2. Add a Signature Line (Word for Windows)

Word for Windows has a built-in Signature Line: Insert → Signature Line (in the Text group) → Microsoft Office Signature Line. Fill in the signer’s name, title and optional instructions, and Word adds a line with an X and the details below it.

You can leave it empty for someone to sign the printout, or sign it in Word: double-click the line and type your name or select an image of your signature. Note that signing through the Signature Line creates a digital signature, so Word asks for a digital ID (certificate). Once signed, the document is marked as final, and editing it removes the signature. Word for Mac and Word for the web do not offer this feature — use method 3 there.

Method 3. Make a line for signing by hand

Most forms and letters just need a simple line like “Signature: ________ Date: ______”. A few ways to make it:

• Underscores. Hold Shift and press the hyphen key. Quick, but the line jumps around when the text near it changes.
• An underlined tab. Turn on underline (Ctrl+U or Cmd+U), press Tab once or twice, turn underline off. The line stays straight up to the tab stop and is easy to extend.
• A borderless table. Insert a 2- or 3-column table, remove all borders and keep only the bottom border of the cell where the signature goes. Put “Signature” and “Printed name” in small type in the row below. This is the neatest option for forms — labels stay right under the lines.
• A line shape. Insert → Shapes → Line, holding Shift to keep it horizontal. Fine for free-form layouts, but it is anchored to the page, not to the text.

Adding a signature in Word on your phone

The Word app for iPhone and Android can insert a picture too (Insert → Pictures), but moving and resizing it with a finger is fiddly, and there is no Signature Line. It is usually quicker to:

1. Open the document in Word (or Pages on iPhone) and save or export it as PDF.
2. Sign the PDF — on iPhone, right in Files with Markup (step by step in how to sign a PDF on iPhone), or in a signing app.

Signature: sign documents for iPhone and Android lets you draw your signature with a finger — with a transparent background from the start — place it on one, all or selected pages and save the document as PDF, JPG or PNG. It does not open .docx files directly, so save the Word file as PDF first. Signing documents comes with PRO.

What about a digital signature?

An image of your signature and a typed name on a line are electronic signatures in the everyday sense — enough for most “sign and send back” requests. If you have been asked to sign with a certificate, use the Signature Line or File → Info → Protect Document → Add a Digital Signature in Word for Windows with a digital ID from a provider, or the e-signature service the other side uses. The difference is explained in what is a digital signature.

In short

• Handwritten signature: Insert → Pictures, wrap In Front of Text, ideally a transparent PNG.
• Signature Line: Word for Windows only; signing it needs a digital ID.
• A neat signing line: an underlined tab or a table with only a bottom border.
• On a phone, save as PDF and sign the PDF instead.