How to Sign a Word Document Electronically: 4 Ways

Quick answer: which way?

1. Save as PDF and e-sign (recommended)

A PDF looks the same on every device and can't be edited as easily as a .docx. Signing the PDF is what most people actually need.

1. In Word, choose File › Save As (or File › Export on some versions) and pick PDF as the format. On a Mac: File › Save As › File Format › PDF.
2. Open Sign a PDF and upload the new PDF.
3. Choose “Just me” and tap “Add my signature.” Draw it with the mouse, trackpad or your finger.
4. Click where it goes, and add the date or your printed name if needed.
5. Click “Finish” and download the signed PDF.

It's free with no account. When you're the only one signing, the file stays on your computer. The signed PDF carries a signature record with the date, time and the document's SHA-256 fingerprint, so any later change can be detected at /verify.

2. Draw your signature in Word

Word 365 on Windows and Mac has a Draw tab (if you don't see it: File › Options › Customize Ribbon › check “Draw” on Windows, or Word › Settings › Ribbon & Toolbar on Mac).

1. Click Draw and choose a pen. Black or dark blue, thin, looks best.
2. Sign where the signature goes with the mouse, trackpad, touchscreen or stylus.
3. Press Esc to stop drawing. Click the ink to move or resize it.
4. Save the document, ideally also as a PDF.

It works, but a mouse signature rarely looks natural, and you have to draw it again every time.

3. Insert an image of your signature

If you sign letters often, a picture of your signature is quicker.

1. Sign on a white sheet of paper with a dark pen, and take a photo or scan it.
2. Crop it close (and save it as PNG if you can).
3. In Word, Insert › Pictures and choose the image.
4. Click the picture, choose Wrap Text › In Front of Text, and drag it onto the signature line.
5. Optional: on Windows, select the picture and your typed name, then Insert › Quick Parts › Save Selection to Quick Part Gallery to reuse it.

Be careful where that image goes: anyone who gets the file can copy your signature from it. It's also only as strong as the evidence around it; see is a scanned signature valid?

4. Signature Line (Windows only)

Word for Windows has Insert › Signature Line › Microsoft Office Signature Line. You fill in the signer's name and title, and a signature box appears. The signer double-clicks it, types or picks an image of their signature, and Word applies a certificate-based digital signature to the file.

The catch: the signer needs a digital certificate (often issued by their company's IT department or a certificate authority), and Word marks the file read-only after signing. The feature isn't available in Word for Mac or Word on the web. It makes sense inside organizations that already manage certificates; for most people it's more trouble than it's worth. The difference is explained in electronic vs. digital signature.

Getting someone else to sign a Word file

The usual routine (email the .docx, they print it, sign, scan and send it back) is slow, and you end up with a blurry scan. A better way:

1. Save the Word document as PDF.
2. Upload it to MultiDocs and choose “Other people.” Tap “Mark where they sign” and add fields for name, date or initials.
3. Send the link by email, text message or WhatsApp. They sign in their browser, no account needed.

You get the signed PDF back by email with a certificate of completion: the email or phone the link was sent to, IP address, device, date and time. Up to 20 people can sign the same document. The free plan includes 15 requests a month. See send a document for signature.

Why a signed .docx is risky

A Word file is meant to be edited. If you sign a .docx and send it, the other person (or anyone they forward it to) can change a price, a date or a clause and the signature still sits there looking valid. Track Changes can be turned off; edits don't always show. With a PDF that has a stored fingerprint, any change, even one character, makes the verification fail. For contracts, that's the difference between “we both have a copy” and “we both have the same copy.” More in how to sign a contract online.