File Format & Compatibility

Fix Word Documents Opening as PDFs Instead of DOCX Files

Ayan Masood Oct 7, 2026 870 views

Question details

Users need to restore normal functionality when Word documents unexpectedly open as PDF files or appear with a PDF icon.

Fix Word Documents Opening as PDFs Instead of DOCX Files

Product: Microsoft Word
Device & OS: Windows
Scenario: Opening existing Word documents from the desktop or file explorer, or saving new documents.
Observed behavior: Files that should be DOCX format are appearing with PDF icons or opening in a PDF reader instead of Microsoft Word.

Before you start

Verify whether the files actually have a .docx extension or if they were accidentally saved as .pdf files by right-clicking the file and checking its Properties.

Solution 1Recommended

Reset Windows File Associations for DOCX

This is the most common fix. It tells Windows to open .docx files using Microsoft Word instead of a PDF reader.

If a PDF reader was accidentally set as the default program for Word files, Windows will use it to open all your DOCX files, making them appear as PDFs.

Open Windows Default Apps

Press the Windows key, type 'Default apps', and press Enter to open the system settings.

Choose default apps by file type

Scroll down to the bottom of the Default apps page and click on the 'Choose default apps by file type' link.

Locate .docx extension

Scroll down the list until you find the '.docx' file extension.

Change the default application

Click on the current application (likely a PDF reader) next to '.docx' and select Microsoft Word from the list of available apps.

Reset Windows File Associations for DOCX

Instant Update: Once you change the default app, all your Word document icons should immediately change back to the standard Word icon.

Solution 2

Adjust the Default Save Format in Word

Use this solution if new documents you create in Word are automatically saving as PDFs.

Solution 3

Repair Microsoft Office

If changing file associations doesn't work, the Microsoft Office installation might be corrupted and requires a repair.

Free Microsoft Office alternative

Open and Edit DOCX Files Seamlessly with WPS Office

If Microsoft Office file associations are constantly breaking or you want a reliable, lightweight alternative to Word, WPS Office is an excellent choice. It perfectly supports DOCX formats and offers a familiar interface without subscription fees.

1. Install WPS Office: Download and install the free WPS Office suite on your computer.
2. Set as Default: During installation, you can choose to set WPS Writer as the default program for all .docx and .doc files.
3. Open your Documents: Double-click any Word document to instantly open it in WPS Writer without formatting loss.

Highly compatible with Microsoft Word DOCX and DOC formatsLightweight and fast to open, preventing file association glitchesFree to use with a familiar, easy-to-learn user interfaceBuilt-in PDF reader and editor in the same application

microsoft office alternative - wps office

Frequently Asked Questions

Why did my Word documents suddenly turn into PDFs?

This is usually caused by a change in Windows default file associations, often triggered by a recent software installation, a system update, or accidentally checking 'Always use this app to open .docx files' when a PDF reader was selected.

Does changing the default app alter the actual file content?

No, changing the default application only tells Windows which program to use when opening the file. Your document's text, formatting, and actual underlying file structure remain completely unchanged.

How do I convert a PDF back to a Word document if it was actually saved as a PDF?

If you accidentally saved a file as a PDF instead of DOCX, changing file associations won't fix it. You will need to use a PDF to Word converter. You can open the PDF in WPS Office and use the 'PDF to Word' tool to convert it back into an editable document.

Document & File Issues