The fastest way: insert a signature line and sign it on screen
Open your Word document and place your cursor where you want the signature to appear. Go to the Insert tab at the top, then click Signature Line (you may need to click a dropdown arrow next to it). A dialog box will open asking for the signer's name, title, and email — fill in what applies or leave it blank. Click OK.
A signature line will appear in your document as a thin horizontal line with an X. Double-click it to open the signing window. You can now sign using your trackpad, mouse, or touchscreen by drawing your signature directly into the box. If you make a mistake, click Clear and try again. Once you're satisfied, click OK to insert your signature into the document.
This method works best when you're signing a document yourself on the same device where you created it. The signature stays embedded in the file, and anyone who opens the document will see your handwritten mark in that exact spot.
Key Takeaways
- Word's signature line tool lets you draw your signature directly into a document using your mouse, trackpad, or touchscreen.
- You can also insert a signature image if you've already photographed or scanned your handwritten signature on paper.
- Signature lines in Word are visual only — they do not create legally binding digital signatures or encrypt the document.
- If you need a signature from someone else, you can send them the document and they can add their own signature line in their copy of Word.
Adding a signature image you already have
If you've already signed a piece of paper and photographed or scanned it, you can insert that image into Word instead of drawing a new signature. First, make sure the image file is saved on your computer — a photo taken with your phone and emailed to yourself, or a scan from a scanner, both work fine.
Place your cursor in the document where you want the signature. Go to Insert and click Pictures, then choose This Device. Navigate to your signature image file and click Insert. The image will appear in your document. You can resize it by dragging the corners, and you can move it by clicking and dragging it to the exact spot you want.
This approach is useful if you prefer to sign on paper first, or if you want to use the same signature across many documents without redrawing it each time. The image becomes part of the document file itself, so the signature will appear the same way to anyone who opens it.
Resizing and positioning your signature
Whether you drew your signature in Word or inserted it as an image, you'll probably need to adjust its size and placement. Click on the signature to select it — you'll see small squares appear around the edges. Drag any corner square to resize the signature while keeping its proportions correct. Drag from the middle of the signature to move it to a different spot on the page.
If your signature is too large or too small compared to the rest of your document, resize it until it looks natural. A signature should typically be between one and two inches wide on the page. If you're signing a formal letter, place it below your typed name. If you're signing a contract or form, place it in the space marked for a signature.
Saving your document with the signature
Once your signature is in place, save the document as you normally would — press Ctrl+S on Windows or Command+S on Mac, or go to File and click Save. The signature will be saved as part of the document. If you want to send the document to someone else, you can email it directly, and they will see your signature when they open it.
If you plan to print the document and mail it, print it as normal and the signature will appear on the printed page. If you want to send a digital copy that shows your signature without printing, the document is ready to share as-is — the signature image or drawing is now permanently part of that file.
What a Word signature is not
A handwritten signature in Word is a visual element only. It does not create a legally binding digital signature, encrypt the document, or prove that you actually signed it. Anyone with access to the file can edit it, delete the signature, or change other parts of the document. If you need a signature that cannot be altered and that proves who signed the document, you need a different tool — Microsoft Word does not provide that level of security.
For most everyday documents — letters, forms you're printing and mailing, or files you're sharing with people you trust — a handwritten signature in Word is sufficient. For contracts, financial documents, or anything where proof of signature matters legally, talk to the other party about whether they need a certified digital signature instead.
Signing a document someone else sent you
If someone sends you a Word document and asks you to sign it, you can add your own signature line in the same way. Open the document, place your cursor where you need to sign, and insert a signature line or image as described above. You can then save the document with your signature and send it back to them.
Alternatively, if the document already has a blank signature line in it, you can double-click that line and add your signature directly. The person who created the document may have set it up this way to make it easier for you. Either way, the process is the same — draw your signature or insert an image of one, then save and send the file back.
Frequently Asked Questions
Can I use the same signature in multiple documents?
Yes. If you insert a signature image, you can copy and paste it into other documents, or you can insert the same image file repeatedly. If you drew a signature using the signature line tool, you'll need to redraw it each time, but the process takes only a few seconds.
What if I don't have a trackpad or touchscreen to draw with?
You can still use a mouse to draw a signature, though it will be less smooth than drawing with a trackpad or stylus. Your best option is to sign on paper, photograph or scan it, and insert the image into Word instead. This gives you a cleaner-looking signature.
Will my signature look the same on someone else's computer?
Yes. Once the signature is part of the document — whether as a drawing or an image — it will appear the same way to anyone who opens the file, regardless of what device or version of Word they use.
Can I delete a signature after I've added it?
Yes. Click on the signature to select it and press the Delete key. The signature will be removed from the document. You can then save the file without it, or add a different signature in its place.
Is a Word signature legally valid?
A handwritten signature in Word is visually valid — it shows that you signed the document. However, it is not legally binding in the way a certified digital signature is, because anyone with the file can edit or remove it. For documents where legal proof of signature matters, ask the other party whether they need a certified digital signature instead.