What is my Browser

What is My Browser — Instantly Detect Your Browser, Version, OS and Technical Settings

Knowing exactly what browser and browser version you are using is more practically important than most people realize — until they encounter a compatibility issue, a website that does not display correctly, a support request that requires specifying browser details, or a web developer trying to diagnose why a feature is not working for a specific user. Browser-related technical details — the browser name, version number, operating system, screen resolution, user agent string, and whether JavaScript and cookies are enabled — are exactly the diagnostic information that technical support teams, web developers, and security researchers need.

SEOToolsN's free What is My Browser tool instantly detects and displays all technical information about the browser you are currently using — identified automatically from your browser's HTTP headers and JavaScript environment. No input required — visit the tool and immediately see your complete browser profile: browser name and version, operating system name and version, device type (desktop, tablet, mobile), screen resolution, color depth, JavaScript status, cookies status, and the complete user agent string.

What the Tool Detects and Why It Matters

1. Browser Name and Version

Your browser name (Chrome, Firefox, Safari, Edge, Opera, Brave) and specific version number (Chrome 124.0.6367.207) are the most fundamental compatibility details. Web features, CSS properties, and JavaScript APIs have varying support across browser versions — a feature fully supported in Chrome 124 may be unsupported in Chrome 80. When reporting a website display issue or seeking technical support, providing your exact browser version (not just 'Chrome' or 'latest') enables precise diagnosis and resolution.

2. User Agent String

The user agent is a text string your browser sends with every HTTP request, identifying itself to web servers. Example: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36. Web servers use user agent strings to: serve browser-specific content, track browser statistics, implement device detection, and configure analytics. Web developers testing browser-specific behavior need the exact user agent string to reproduce issues in testing environments.

3. Operating System Detection

The operating system (Windows 11, macOS Ventura, Ubuntu 22.04, iOS 17, Android 14) affects browser behavior, font rendering, available system fonts, touch input handling, and platform-specific features. Many browser compatibility issues are actually OS-specific rather than browser-specific — a rendering difference between Windows Chrome and macOS Chrome reveals an OS-level difference rather than a pure browser difference. The tool identifies both OS name and version.

4. Screen Resolution and Display

Screen resolution, device pixel ratio, and color depth affect how websites display — responsive design breakpoints, high-DPI image serving (Retina displays), and color accuracy all depend on display characteristics. Web developers testing responsive design need to know whether test results come from a 1920×1080 desktop display or a 375×812 mobile display. The tool reports current screen dimensions, available viewport dimensions, and device pixel ratio.

How to Use SEOToolsN's What is My Browser Tool

• Step 1: Navigate to the What is My Browser tool on SEOToolsN.com.
• Step 2: Your browser information appears automatically — no input needed.
• Step 3: Note your browser name and exact version number.
• Step 4: Note your operating system name and version.
• Step 5: Check your screen resolution and device pixel ratio.
• Step 6: Verify JavaScript is enabled (required for most modern websites).
• Step 7: Verify cookies are enabled (required for login sessions and preferences).
• Step 8: Copy the user agent string if needed for technical support or developer testing.
• Step 9: Use the information when filing bug reports, seeking technical support, or testing compatibility.
• Step 10: Share your browser details with web developers or support teams as needed.

Competitor Comparison — What is My Browser Tools

Tool	Full UA String	OS Detection	Screen Info	Login Required	Free
SEOToolsN	Yes	Yes	Yes	No	100% Free
WhatIsMyBrowser.com	Yes	Yes	Yes	No	Free
BrowserSpy	Yes	Yes	Yes	No	Free
AmIUnique	Yes	Yes	Yes	No	Free
Browserling	Yes	Yes	Yes	No	Freemium
Google Chrome (built-in)	Yes	Yes	Limited	No	Free

 

Practical Uses of Browser Detection Information

Technical Support and Bug Reporting

When reporting a bug to a website, web application, or software vendor, including your complete browser information transforms a vague report ('the button doesn't work') into a reproducible, diagnosable report ('the submit button does not respond in Chrome 124.0.6367.207 on Windows 11 Pro at 1920×1080 with cookies enabled'). This specificity allows developers to reproduce the exact environment and test fixes targeted to your configuration.

Web Development and Testing

Web developers checking their websites in different browsers use the tool to verify exactly which browser version they are testing in — ensuring test results are correctly attributed to the right browser version. When testing responsive design, confirming the screen dimensions and device pixel ratio the test browser is reporting ensures that responsive breakpoints trigger correctly. User agent strings from the tool enable configuring browser emulation in testing frameworks.

Security and Privacy Awareness

The What is My Browser tool demonstrates what information websites automatically receive from your browser without any explicit permission — your browser identity, operating system, screen dimensions, language preferences, and more. This browser fingerprint can be used to identify and track individual users across websites even without cookies. Understanding the extent of this automatic information disclosure helps users make informed decisions about privacy tools, browser settings, and when additional protection (VPN, privacy browsers) may be appropriate.

Frequently Asked Questions

Can I change my user agent to appear as a different browser?

Yes — most browsers allow changing the user agent string through developer tools or extensions. In Chrome: DevTools > Network conditions > User agent. This is useful for web developers testing how their website responds to different browser identifications and for accessing content that blocks certain browser types. Note that while the user agent changes, other browser fingerprint characteristics (installed fonts, screen resolution, JavaScript API support) may still reveal your actual browser environment to sophisticated detection systems.

Why does my browser version matter for website compatibility?

Browser versions determine which web features are supported. HTML5 features, CSS Grid, CSS Custom Properties, JavaScript ES2022+, Web APIs like WebP images, WebAssembly, and hundreds of other capabilities have specific browser version requirements. A website built for modern browsers may display incorrectly or fail to function in older browser versions. Knowing your exact browser version helps diagnose compatibility issues and decide whether updating your browser resolves the problem.

What browser should I use for best web compatibility in 2026?

Chrome (Google), Edge (Microsoft Chromium-based), and Firefox (Mozilla) are the three browsers with the broadest modern web compatibility in 2026. All three receive frequent security and feature updates. Safari (Apple) is excellent on macOS and iOS with good compatibility but occasionally lags in implementing newer web standards. Brave (privacy-focused, Chromium-based) provides Chrome-level compatibility with enhanced privacy features. For web development testing, test in at least Chrome and Firefox to cover most compatibility scenarios.

Conclusion

Your browser details — seemingly mundane technical information — are the essential diagnostic data that enables precise debugging, accurate bug reporting, compatibility testing, and privacy awareness. The What is My Browser tool makes all this information instantly accessible in one clear, comprehensive display, eliminating the need to navigate browser settings menus or remember where to find version information.

Use SEOToolsN's free What is My Browser tool whenever you need to report a technical issue, verify your browser setup, provide information to a developer or support team, or understand exactly what technical profile your browser presents to every website you visit. Bookmark it — you will use it more often than you expect.