PDF vs Word: Which Format Should You Use and When?

PDF and Word (.docx) are the two most dominant document formats in the world — but they serve very different purposes. Choosing the wrong format can mean sending a document that looks broken on the recipient's device, losing your formatting, or locking yourself out of editing content you need to change. Here's a complete guide to when you should use PDF, when Word is better, and how to switch between them in seconds.

What Is a PDF and Word Document?

What Is a PDF?

PDF (Portable Document Format) was created by Adobe in the 1990s and is now an open standard. A PDF preserves the exact layout, fonts, colors, and graphics of a document regardless of what device, operating system, or software is used to view it. What you see is always what the recipient gets.

What Is a Word Document?

A Word document (.docx) is a dynamic, editable document created by Microsoft Word. Its appearance can change depending on the software version, installed fonts, and screen settings of the person opening it. Word files are optimized for creation and collaboration, not for finalized distribution.

PDF vs Word: Key Differences

Editability: Word is easy to edit; PDFs are locked by default (unless you convert them)
Consistency: PDFs look identical everywhere; Word files may reflow on different systems
File size: PDFs are usually smaller (especially after compression); Word files can be large with embedded assets
Compatibility: PDFs can be opened anywhere without software; Word requires Word or compatible apps
Collaboration: Word supports real-time collaboration in Microsoft 365 and Google Docs; PDFs require special tools for editing
Security: PDFs can be password-protected and permissions-locked; Word has basic protection features
Printing: PDFs are print-ready and WYSIWYG; Word may print differently than it appears

When to Use PDF

Sending final contracts, invoices, or agreements
Sharing resumes and job applications
Distributing reports, whitepapers, or presentations for reading
Publishing content for web download
Submitting official forms or government documents
Archiving documents for long-term storage

When to Use Word (.docx)

Drafting and collaborating on documents
Writing content that will be reviewed and revised
Creating templates that others will fill out and customize
Working with editors or proofreaders using Track Changes

How to Convert Between PDF and Word in Seconds

Need to switch formats? Plainscan makes it instant:

PDF to Word →Word to PDF →

Convert locked PDFs into editable .docx files or your draft into a professional, fixed PDF.

Frequently Asked Questions

Should I send my resume as PDF or Word?

Almost always PDF. A PDF ensures your resume formatting looks identical on any device. Unless the employer specifically requests a .docx file, PDF is the professional standard for resumes.

Can a PDF be edited?

By default, PDFs are not easily editable. You can convert a PDF to Word to edit it, or use a PDF editor tool. Plainscan's PDF-to-Word converter makes editing straightforward.

Which is smaller in file size — PDF or Word?

It depends on the content, but PDFs are often smaller — especially when compressed. A heavily formatted Word document with images can be much larger than an equivalent PDF.

Is PDF better than Word for printing?

Yes. PDFs are print-ready files — what you see on screen is exactly what comes out of the printer. Word documents can have margin, font, and layout differences depending on the printer settings.

Convert Between PDF and Word Instantly — Free

Switch from PDF to Word or Word to PDF in seconds, with no quality loss.

Final Verdict

"Choosing between PDF and Word doesn't have to be complicated. Use Word for creating and editing, and use PDF for sharing and printing. And when you need to switch between the two, Plainscan has you covered with free, instant conversion tools."