Send a PDF when the document is finished and the reader’s job is to read, print or sign it. Send a Word file when the reader’s job is to change it. If you cannot tell which applies, ask yourself what the person will do next, because the format question is really a question about that next step.
There is one rule above all others: if the recipient has asked for a particular format, send that format. Application portals, publishers, courts and clients often have reasons you cannot see.
Why the two formats behave differently
A DOCX file stores content and instructions, and each computer lays them out again when it opens the file. Line breaks and page breaks depend on the fonts and software in use, so the page your reader sees may not match yours. We explain why in why Word to PDF changes your layout.
A PDF stores finished pages, with the position of each character fixed and usually with its fonts embedded. Page 7 is page 7 on every device. In exchange, it is awkward to edit, because a PDF does not really know what a paragraph is.
| Word (.docx) | ||
|---|---|---|
| Looks the same everywhere | No | Yes |
| Easy to edit | Yes | No |
| Tracked changes and comment threads | Built for it | Comments only |
| Reads well on a phone | Reflows, if the app supports it | Fixed pages, more zooming |
| Hidden author data and past edits | Often present | Possible, usually less |
| Good for long-term records | Fair | Good, and PDF/A is designed for it |
Real scenarios
Job applications
Send a PDF unless told otherwise, since your layout is part of the impression you make. There is one common exception: recruiters and some applicant tracking systems ask for Word so they can parse it or add their own branding. Follow the listing. Whichever you send, make sure the PDF has real text, not an image. If you can select a sentence with your cursor, it does. Otherwise, a text search for your name will fail. Our PDF to Text tool is a quick check: what it extracts is roughly what a parser sees.
Contracts under negotiation
Use Word with tracked changes while the terms are still moving. Lawyers on both sides need to see and accept individual edits, and a PDF forces them to retype. Once it is agreed, produce a PDF of the final clean version for signing. That PDF is the record everyone refers to. Sending a PDF too early can read as “take it or leave it”, so do so only if you mean it.
Invoices and quotes
Always PDF. The numbers should not be editable by accident, and the customer’s accounting software or inbox will treat it as a document, not a draft. Accounts teams file these for years, and a stable appearance is what they need.
A draft for your manager or colleague
Word, or better, a shared link to one live copy, if your team works in Microsoft 365 or Google Docs. Emailing a DOCX around tends to produce “report_v3_final_JD_edits.docx” and a merge headache. If you only want feedback on the content, a PDF with comments is fine, and prevents anyone from quietly rewriting your text.
Forms for people to complete
Consider who will fill it in. A fillable PDF keeps your layout fixed and restricts input to the fields, which is why official forms use it. A Word form is quicker to make, and fine internally, but people can and do break the layout. If most of your recipients will complete it on a phone, consider a web form instead, since neither format is pleasant on a small screen.
Reports for clients or the board
PDF, with a Word or Excel copy offered only if they need to reuse the material. A PDF ensures that the charts stay where you put them. If the report is long, add bookmarks, since they make a long PDF far easier to navigate.
Printing at a shop
PDF, with fonts embedded and at the size the printer specified. Ask for their export settings. Sending Word to a print shop invites a font swap on their machine and an unpleasant surprise on your paper.
Text for translators, editors and website teams
Word or plain text. These people need to work with the words. Translators in particular use software that handles DOCX far more cleanly than PDF, and a PDF can cost you money as well as time, since someone has to extract the text first.
Uploading to government or court systems
Follow the portal’s specification to the letter. These systems commonly specify PDF, sometimes PDF/A, and often impose size limits. A PDF that is too large is a frequent reason for rejection, and compressing it needs care if the text has to stay searchable.
Sending to someone you know little about
PDF. It opens on anything without asking the reader to own particular software, and no macro warning will appear. Unexpected attachments in Word formats are also treated more warily by security-minded people and mail filters, since macro-enabled Office files have a long history as a malware route.
The privacy check people skip
The biggest risk in sending Word is what the file carries invisibly. A DOCX can hold author names, the names of editors, comments, tracked deletions, and text formatted as hidden. Accepting all changes before you send is not the same as checking, and “deleted” text in tracked changes is still in the file until the changes are resolved. We show how it is stored in what is inside a DOCX file.
Before sending a Word file outside your organisation:
- Run Word’s Document Inspector (File > Info > Check for Issues > Inspect Document). It finds comments, revisions, document properties and hidden text.
- Look at the file yourself with our DOCX Metadata Viewer. It reads the author and revision details stored inside, and counts tracked insertions and deletions.
Exporting to PDF removes most of this, but not by magic. Word can export comments and markup if you leave them showing, and the PDF’s properties can still carry the author’s name. Open the exported PDF and read it before it goes out. Our PDF Metadata Viewer shows what its properties say.
Getting from one to the other
From Word to PDF, use Word. File > Save As or Export > PDF gives the most faithful result, since Word is doing its own layout. Our DOCX to PDF tool works differently: it rebuilds the document from its content in the browser. Headings, lists, tables and PNG or JPEG images carry over, but fonts become Helvetica, Word headers and footers are dropped, and page breaks fall in new places. That helps when you want a quick readable PDF on a machine with no Word. It is the wrong tool for a designed CV, or any document where the exact layout matters.
From PDF to Word, expect some cleanup. Word can open a PDF and try to reconstruct it, and Adobe Acrobat has an export option. Both rebuild paragraphs from character positions, so simple text comes out well, and complex layouts with columns or tables need work. Going back to the original Word file is always better, if you still have it.
When it is fine to send both
For a report or proposal, attaching both is a reasonable courtesy: the PDF is what you stand behind, and the Word copy is for reuse. Say so in the message. Do not do this with a contract, where two copies can create doubt about which is authoritative. And do not do it with anything where the Word version carries comments or history you have not cleaned.