What is a User-Agent?

Your browser’s User-Agent is like a digital ID card. It tells websites what browser and device you’re using. This text string, sent with every web request, reveals details like your browser type, version, operating system, and sometimes even your device model. Our What is my User Agent? tool quickly decodes this info, showing you everything from your screen resolution to whether cookies are enabled, all in a simple format.

Whether you’re a web developer testing site compatibility, an IT pro fixing issues, or just curious about your setup, this tool is perfect. It’s free, fast, and works on any device, giving you a clear snapshot of your browser’s identity in seconds.

How to Use Our User-Agent Checker

Using our What is my User Agent? tool is super easy! Here’s how it works:

1. Click the “Detect My Browser” button above.
2. Wait a moment as our tool analyzes your browser and device details.
3. Check out the results, including your User-Agent string, browser, OS, mobile device model, screen size, and more!

You’ll get a detailed breakdown, including:

• User-Agent String: The raw data your browser sends, with a handy copy-to-clipboard option.
• Browser: Name and version, like Chrome 118.
• Operating System: Your OS, such as Windows 11 or iOS 17.
• Device Type: Whether you’re on a desktop, mobile, or tablet.
• Mobile Device Model: Specific device model, if detectable, like iPhone 14 or Samsung Galaxy S21.
• Screen Resolution: Your device’s screen dimensions, like 1920x1080.
• Window Size: The current browser window size.
• JavaScript & Cookies: Whether these features are enabled.
• Language: Your browser’s preferred language.

No input needed, just click and see your browser’s full profile!

Why Check Your User-Agent?

Our What is my User Agent? tool is a must-have for anyone working with or curious about the web. Here’s why it’s so useful:

• Web Development: Test how your site looks on different browsers, devices, and mobile models to ensure everything works perfectly.
• Troubleshooting: Spot browser or OS issues that might be causing website problems.
• Security Insights: Check your browser’s reported details to catch any spoofing or misconfigurations.
• Analytics: Understand your device setup, including mobile models, to optimize apps or websites.
• Free & Easy: No cost, no hassle, just instant results in a clean, easy-to-read interface.

It’s a simple way to get a clear picture of your browser and device, whether you’re building a website or just exploring your tech setup.

Fascinating Facts About User-Agents

User-Agent strings are more than just tech details, they’re a peek into the web’s history! Here’s some cool trivia to spark your interest:

• Ancient Beginnings: User-Agents started in the early 1990s with browsers like Mosaic. Back then, they were super simple, like "Mosaic/0.9", but they got more complex as browsers evolved.
• Browser Wars Legacy: Ever notice "Mozilla" in most User-Agent strings? It’s a throwback to Netscape’s codename, kept for compatibility so browsers like Chrome and Firefox can play nice with older websites.
• Sneaky Bots: Some bots use fake User-Agent strings to pretend they’re browsers, which can make detection tricky. Our tool shows you exactly what’s being sent!
• Mobile Surge: With over 60% of web traffic coming from mobile devices in 2025, User-Agents are crucial for making sure websites look great on phones and tablets.
• Privacy Shift: Modern browsers like Safari and Firefox are simplifying User-Agent strings to reduce tracking, striking a balance between functionality and protecting your privacy.

These facts show why knowing your User-Agent is so interesting. Try our tool to dig into your browser’s unique identity!

Frequently Asked Questions

What is a User-Agent string?

It’s a text string your browser sends to websites, sharing details about your browser, OS, and device type. Our tool breaks it down for you in a clear way.

Why do websites need my User-Agent?

Websites use it to tailor content, like showing mobile-friendly layouts or ensuring browser compatibility. It helps make your browsing experience smooth and seamless.

Can I change my User-Agent?

Yes, developers often tweak User-Agents in browser tools for testing. Our tool shows what your browser is currently sharing with websites.

Is this tool free?

Completely free with no limits! Check your User-Agent anytime, anywhere.

Does this collect personal data?

Not at all! We only use standard browser info, like User-Agent and screen size, with no tracking or personal data collected.

Why do some User-Agents look so long?

Modern User-Agents pack in lots of details, like browser, version, OS, and more, to help websites customize your experience. Our tool makes it easy to understand!