
Word supports several signature workflows: an image of your handwritten signature, a formal signature line, or a real digital signature backed by a certificate. They serve different purposes.
Does this affect you?
Use this for Word for Microsoft 365, Word 2021, and Word 2019 on Windows or Mac when a document needs a visible signature or a more formal signing process.
Insert an image of your handwritten signature
This is enough for many everyday letters and forms.
- Sign your name on plain white paper with a dark pen.
- Scan it or photograph it with even lighting.
- Save or transfer it as a JPG or PNG.
- Crop the image to the signature area using a photo app or Picture Format > Crop in Word.
- If needed, use Picture Format > Color > Set Transparent Color and click the white background.
- Open Insert > Pictures > This Device and choose the signature image.
- Resize with a corner handle so it keeps its proportions.
Insert a signature line
Use this for a printed signature line or a digital-signature prompt.
- Click where the line should appear.
- Open Insert > Signature Line > Microsoft Office Signature Line.
- Enter the suggested signer name, title, and email if needed.
- Click OK.
- Print for a handwritten signature, or double-click the line to sign digitally if a digital ID is available.
More control
Save the image for reuse
Select the finished signature image, open Insert > Quick Parts > Save Selection to Quick Part Gallery, name it Signature, and insert it from Quick Parts in future files.
Digital signatures need a certificate
A signature line alone does not prove identity or detect tampering. For certificate-based signing, use File > Info > Protect Document > Add a Digital Signature and obtain a certificate from your organization or a certificate authority.
PDF signing may be simpler
For multi-person signing or legal workflows, export to PDF and use Adobe Acrobat, Preview on Mac, DocuSign, Adobe Sign, or another e-signature service.
Mac support differs
Word for Mac can insert signature images, but the Windows Signature Line workflow is not equivalent. Mac users often sign the exported PDF instead.
Sources
- Microsoft Support – Add or remove a digital signature (2025)
- Microsoft Support – Insert a signature line (2025)
- Microsoft Support – Create and insert a handwritten signature (2024)
