PDF or Word? Which to Send, and Why It Matters
The choice is not about which format is better. It is about whether the recipient should be able to change the document. Everything else follows from that one question.
The rule
- Send a PDF when the document is finished and must look the same everywhere. A contract, an invoice, a CV, a report, a ticket.
- Send Word when the recipient needs to edit, comment or continue the work. A draft, a template, a document under negotiation.
- When unsure, send both. Say which one is authoritative. It removes the guesswork and costs nothing.
Why PDF for finished documents
- It renders identically on every device. Word reflows depending on fonts and version; a page that fits on yours can spill onto a second page on theirs.
- Fonts travel with the document, so your layout survives even if the recipient lacks the typeface.
- It signals finality. A PDF says "this is the version"; a .docx invites changes.
- It is harder to edit accidentally, which protects both parties.
- It is what printers, courts, portals and most clients ask for.
Why Word for working documents
- Comments and tracked changes are the point of a review, and they do not survive conversion to PDF.
- Reusing the content — pulling a paragraph into another document — requires text you can edit.
- Accessibility tools work better on the source format.
- Templates need to stay editable to be useful.
The round trip that wastes an hour
Sending a PDF to someone who needs to edit it, who converts it to Word, edits it, converts it back to PDF, and returns a document whose layout has drifted twice.
If you know the document will be edited, send Word first. Convert to PDF at the end, once. Every unnecessary conversion loses a little fidelity, and two of them lose a noticeable amount.
Edge cases worth knowing
- Anything that will be signed: PDF. A signature on a .docx is fragile.
- Anything going to a government portal: almost always PDF, and often PDF/A.
- Anything with complex equations or chemistry: PDF, unless the recipient has the same software.
- Anything being translated: Word. Translators work in the source format.
- Anything over about 50 pages where the recipient may print it: PDF, for the page breaks.
Privacy
Word files carry revision history, author names and deleted text unless you strip it. A PDF converted from Word carries only what you can see — which is itself a reason to convert before sending a document to someone outside your organisation.