pdfpix

Sign a word document

You can sign a Word file in place, or export it to PDF and sign that. The PDF route is the one that survives being emailed, because a Word document is still editable when it lands and a signature inside it is only as fixed as the paragraph around it. This guide covers both.

Two different jobs

Signing a Word document usually means one of two things. Either you are the person who has to put a name on it, or you are preparing a document for somebody else to sign. The answers pull in opposite directions.

If you are signing, export to PDF and sign the PDF. If you are preparing, leave a clear signature line and send a PDF anyway, because a Word file invites the recipient to edit the terms while they are in there.

A signature line in Word

Word can insert a signature line, which places a marked area with a name and title under it. On its own it is a printed line with a label. It tells the reader where to sign and holds nothing cryptographic.

That is often exactly what you want when the document is going to be printed, or exported to PDF and signed with a drawing. Microsoft moves the ribbon around between versions, so look under the insert commands rather than following a menu path from an old article.

A picture of your signature in Word

Insert an image of your handwriting the way you would insert any picture, and set it to sit in front of the text so it does not push the paragraph around. Crop it tight and use a PNG so the white background does not cover the line beneath.

The catch is that the recipient can select the image, drag it, delete it, or move it to a different document. It is a picture in an editable file, which is a weaker position than the same picture in a PDF.

A certificate signature in Word

Word can apply a real digital signature using a certificate, marking the document as final and reporting a change afterwards. It is a Windows feature in practice, and it needs the same certificate covered in the certificate guide.

The signature applies to the Word file. Export that file to PDF and the signature does not come with it, because a new document is being written. If the PDF has to carry a certificate signature, sign the PDF.

Why the PDF route survives being emailed

A PDF fixes the layout. Fonts, page breaks and spacing arrive as they left, and the signature stays where you put it. A Word file reflows against whatever fonts the recipient has, which moves a signature image away from the line it belonged to.

It also stops the casual edit. Nobody changes a payment term in a PDF by accident, and the file that gets filed is the file that got agreed.

Export, then sign

Save or export as PDF from Word, then sign the PDF with the software on your machine. Preview on a Mac, Markup on an iPhone, or the free Acrobat Reader on Windows. The signing guide covers each of them.

Do all the document work before this step. If pages have to be reordered or a scanned sheet merged in, run Organize pages and the merge tool first, because both write a new file.

After the signature

Signed contracts get emailed, and a signature photograph makes a document heavier than the mailbox wants. The compress tool takes a size target and checks the text is still selectable before it hands the file over.

A file exported from Word also carries your name and your software in its document properties. The privacy scan lists every field it finds and removes the ones you pick.

Questions people ask

How do I sign a Word document electronically?
Export it to PDF and sign the PDF, which is the version that survives being emailed. Word can also insert a signature line or a picture of your handwriting, but both stay editable in the Word file.
Should I sign the Word file or the PDF?
The PDF, in almost every case. It fixes the layout so the signature stays on the line you put it on, and it stops a recipient from editing the terms while the document is open.
Does a signature survive when the Word file is edited?
A picture of a signature survives and can be moved or deleted by anyone with the file. A certificate signature does not: Word reports the document as changed once somebody edits it.
Can I sign a Word document on a Mac?
Export to PDF and sign in Preview, which captures a signature from the trackpad or the camera and reuses it on every later document. The certificate signing feature in Word is a Windows one in practice.
Can the other side edit the file after I sign it?
They can edit a Word file freely, and nothing in the document says it changed. Send the PDF instead when that matters, because a certificate signature over the PDF reports any change made after it was applied.

Where to go next