How to Show File Extensions in Windows 11

How to Show File Extensions in Windows 11

Know exactly what you're clicking. Learn how to display file extensions in Windows 11 and avoid costly mistakes.

By Rodger Mansfield, Technology Editor

October 15, 2025

Have you ever opened a file thinking it was a harmless document, only to realize it was something else entirely?

That tiny “.exe” or “.pdf” at the end of a filename isn’t just decoration. 

It’s the digital equivalent of a food label. 

And yet, Windows 11 hides these extensions by default, leaving users to guess what they’re dealing with. 

For business users, educators, and anyone juggling dozens of files a day, that’s a recipe for confusion or worse, a security risk.

Here's a Cool Tip:  Show File Extensions in Windows 11.

What Are File Extensions and Why Should You Care?

File extensions are those little tags at the end of filenames, like .docx, .jpg, or .xlsx. 

They tell Windows what kind of file it is and which app should open it. 

Without them, you're flying blind. 

Is “report” a Word doc or a spreadsheet? 

Is “invoice” a PDF or a zipped archive?

Showing file extensions gives you:

• Instant clarity.
• Better control over file types.
• A layer of protection against malicious files disguised with misleading icons.

What You'll Gain

• Spot risky or mislabeled files instantly.
• Save time when organizing or renaming files.
• Avoid opening the wrong app or sending the wrong format.

Step-by-Step Instructions

Here's how to do it.

On Windows 11 Desktop

1. Open File Explorer.
2. Click the View tab in the top toolbar.
3. Select Show, then click File name extensions.
4. You’ll now see extensions like .txt, .jpg, and .exe next to every filename.

fig. 1 - Show File Name Extensions in Windows 11

On Microsoft Web/OneDrive

1. The OneDrive web interface doesn’t let you toggle file extensions directly. 
2. Files uploaded from Windows will retain visible extensions if you’ve enabled the setting on your desktop.

Pros and Cons

Pros:

• Makes file types instantly recognizable.
• Helps spot suspicious or misnamed files.
• Useful for renaming or batch editing file types.

Cons:

• Adds visual clutter for users who prefer minimal filenames.
• Might confuse non-technical users unfamiliar with extensions.

Feature Access

This Cool Tip works for:

• All Windows 11 users (Home, Pro, Enterprise).
• No subscription required.
• No admin privileges needed.

Score

Criterion | Score | Justification

Value: 9/10 

This feature improves clarity, security, and productivity for nearly every user.

Usability: 10/10 

One-click toggle. No training required. Works instantly.

Wow Factor: 7/10 

Not flashy, but surprisingly satisfying once enabled. It’s a quiet productivity win.

Total Score: 26/30 🌟 Excellent. 

Highly recommended for immediate use.

Key Takeaways

Showing file extensions in Windows 11 is a simple tweak with outsized benefits. 

It helps users avoid mistakes, spot threats, and manage files more efficiently. 

If you work with documents daily, this is a must-enable feature.

Try It Yourself

Toggle file extensions today to see how much smoother your workflow becomes. 

Share this tip with your team, subscribe to our newsletter, and let us know how it helped.

READ MORE

• What Happens When Windows 10 Support Ends and What You Should Do Next
  
• The Clock is Back: Why Windows 11's September 2025 Update Matters
  
• How to Enable or Disable Airplane Mode on Windows 11 and Windows 10
  

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Rodger Mansfield, a seasoned tech expert, is the mastermind behind www.OneCoolTip.com where he serves as both writer and editor. With a keen eye for simplifying complex tech, Rodger delivers practical advice that empowers readers to navigate the digital world with confidence. Dive into www.OneCoolTip.com for a treasure trove of savvy tips and tricks that keep you one step ahead in tech.

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