How To Check Your User Agent (Beginner-Friendly Guide For 2025)

Understanding your user agent string can help with troubleshooting, testing, and browser behavior analysis. Whether you're a developer, a digital marketer, or just curious, here’s how to check your user agent on any browser or device.

What Is a User Agent?

A user agent is a string of text that your browser sends to websites. It identifies your browser type, operating system, and device. This information helps websites serve the correct layout or version of their content.

Example of a typical user agent string:

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36

How to Check Your User Agent in 2025

Use Online Tools (Easiest Way)

These tools instantly show your current user agent:

They require no setup and work across all major browsers.

Check via Browser Console

Works in Chrome, Firefox, Edge, Safari:

  • Open Developer Tools (press F12 or Ctrl + Shift + I)

  • Go to the Console tab

  • Type this code and hit Enter: console.log(navigator.userAgent);

Use Network Tab in DevTools

  • Open Developer Tools

  • Navigate to the Network tab

  • Reload the page

  • Click the first network request

  • Under Request Headers, find the User-Agent entry

Use Command Line (Advanced)

On macOS, Linux, or WSL terminals:

  • Show your user agent directly:

    curl -A "" https://www.whatismybrowser.com/detect/what-is-my-user-agent

  • Or see full headers:

    curl -I https://example.com

Notes About User Agents

  • User agent strings can be spoofed by bots or browser extensions

  • Strings may be misleading due to compatibility masking

  • For developers: use feature detection (like Modernizr) over relying on user agent parsing

Conclusion

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Frequently Asked Questions (FAQs)

❓What is a user agent used for?

Websites use it to determine how to display content (e.g., mobile vs. desktop) and what features are supported by your browser.

❓Can I change my user agent?

Yes. Most browsers and extensions allow you to change your user agent for testing or privacy.

❓Is user agent detection reliable?

Not always. It's better to use feature detection when possible for web development.