Windows can hide common filename extensions such as .pdf, .jpg, .docx, and .exe. Showing extensions makes file types easier to identify and is useful when troubleshooting downloads or renaming files.
Before you start: Save important work and avoid deleting, resetting, or changing anything you do not understand. Software menus can move slightly between versions.
Step-by-step instructions
Step 1: Open File Explorer
Open any folder in File Explorer.
Step 2: Open View options
Use the View menu and look for the Show options.
Step 3: Enable extensions
Turn on File name extensions.
Step 4: Check a few files
Confirm that known documents and images now show endings such as .pdf, .jpg, or .docx.
Useful tips
- Changing an extension does not convert the underlying file format.
- Be careful when renaming the part after the final dot.
- Visible extensions help you notice when a downloaded file is an unexpected executable.
Frequently asked questions
What is a file extension?
It is the ending after the final dot in a filename and helps identify the file format.
Can I hide extensions again?
Yes. Return to the same View setting and turn the option off.
Can I rename .txt to .pdf?
You can rename it, but that does not convert the text file into a real PDF.
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