User Agent Checker – Instantly View Your Browser’s User Agent
Your browser sends a User Agent string to every website you visit. This string contains important technical information about your browser, operating system, and device type. With 99tools.in’s User Agent Checker, you can instantly view this data and understand what your browser is sharing.
Your User Agent Info
Find Out What Your Browser Tells Websites About You
Your browser sends a User Agent string to every website you visit. This string contains important technical information about your browser, operating system, and device type. With 99tools.in’s User Agent Checker, you can instantly view this data and understand what your browser is sharing.
What Is a User Agent?
A User Agent (UA) is a string of text your browser automatically sends to web servers when you visit a website. It typically includes:
Browser name and version
Operating system and device info
Rendering engine (e.g., WebKit, Gecko)
Platform (desktop, mobile, tablet)
For example
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
⚡ Why Use Our User Agent Checker?
✅ Instant Results – See your full User Agent string in a single click
✅ No Installation – 100% web-based and mobile-friendly
✅ Real-Time Detection – Shows exactly what websites see
✅ Developer Friendly – Perfect for testing browser-specific features
✅ Privacy Insight – Know what fingerprinting data your browser exposes
🧰 Who Should Use a User Agent Checker?
Developers – Debug browser compatibility or implement user agent-based features
Testers – Check how your site behaves across devices and browsers
SEO Experts – Simulate bots or user agents to verify site rendering
Privacy Advocates – Understand the data your browser reveals
Support Teams – Help users report environment details for troubleshooting
🔗 Related Tools for a Complete Web Diagnostic
Maximize your insight with these complementary tools:
IP Finder – Discover your public IP address
Traceroute Tool – Trace the route to any server
DNS Lookup – Resolve domain names and see DNS records
Ping Tool – Measure network latency to any IP or domain
HTTP Header Checker – View response headers from any URL
💬 FAQs
Q: What can websites do with my user agent?
Websites can customize content or layout based on your user agent, but they can also use it as part of browser fingerprinting for tracking purposes.
Q: Can I change my user agent?
Yes. Most modern browsers allow you to spoof or override your user agent using developer tools or extensions.
Q: Is this tool free?
Yes, it’s completely free and doesn’t store or track your user agent data.
User agent checker
Online user agent viewer
What is my user agent
Browser user agent string
User agent string lookup
Browser fingerprinting info
Developer user agent tool
Check my browser info

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