# PDF vs Word: which format should you use?

Source: https://www.mergevanta.com/compare/pdf-vs-word
Published: 2026-10-21
Updated: 2026-10-21
Author: Mergevanta

> PDF vs Word compared on editing, layout, compatibility and security — plus when to send a PDF, when to share a .docx and how to convert between them free.

## In short: What is the difference between PDF and Word?

A Word document (.docx) is made to be edited: text reflows and anyone with Word, Pages or Google Docs can change it. A PDF is made to be shared and printed: it looks the same on every device but is hard to edit. Draft in Word, then send the final version as a PDF.

## PDF vs Word at a glance

|  | Word (.docx) | PDF |
| --- | --- | --- |
| Main purpose | Writing and editing | Sharing, printing and archiving |
| Looks the same everywhere | Not always — depends on the app and fonts | Yes |
| Easy to edit | Yes | No — needs a PDF editor or conversion |
| Opens without extra software | Needs Word, Pages, Google Docs or similar | Opens in any web browser |
| Tracked changes | Yes | No — comments and annotations only |
| Long-term archiving | Not ideal | Yes, as PDF/A |
| Best for | Drafts and collaboration | Final versions, forms and contracts |

## When to use Word

- While a document is still being written, reviewed or negotiated.
- When several people need to edit it, with comments and tracked changes.
- For templates — letters, invoices or reports you fill in again and again.

## When to use PDF

- For the final version you send to someone else: a contract, invoice, CV or report.
- When the layout must not move — forms, brochures, anything that will be printed.
- When the reader may not have Office: every phone and computer can open a PDF.
- For records you need to keep for years, ideally as PDF/A.

## How to convert between PDF and Word

Turn a finished document into a PDF with [Word to PDF](https://www.mergevanta.com/word-to-pdf), or get an editable .docx back from a PDF with [PDF to Word](https://www.mergevanta.com/pdf-to-word). To combine several files first, use [Merge Word](https://www.mergevanta.com/merge-word) or [Merge PDF](https://www.mergevanta.com/merge-pdf). All four are free, with no watermark and no sign-up.

## Frequently asked questions

### Is PDF or Word better for a CV or résumé?

Send a PDF unless the employer asks for Word. A PDF keeps your layout and fonts exactly as you designed them, while a .docx can reflow in a different word processor. Some application systems prefer .docx, so check the job listing.

### Can I edit a PDF in Word?

Yes. Recent versions of Word can open a PDF and convert it into an editable document, although complex layouts may shift. [PDF to Word](https://www.mergevanta.com/pdf-to-word) does the same conversion online, with nothing to install.

### Is a PDF more secure than a Word document?

A PDF is harder to change unnoticed and can be password-protected or digitally signed, which is why contracts and invoices are usually sent as PDFs. Word files can be password-protected too, but they are designed to be edited.

### Should I send a contract as a PDF or a Word file?

Negotiate in Word, where tracked changes show every edit, then send the agreed version as a PDF for signing so the wording can't shift.

Free tools: [Word to PDF](https://www.mergevanta.com/word-to-pdf), [PDF to Word](https://www.mergevanta.com/pdf-to-word), [Merge PDF](https://www.mergevanta.com/merge-pdf)