What Is My Browser

Instantly identify your web browser name, version, operating system, screen resolution, and complete user agent string with our free What Is My Browser tool. This essential utility reveals exactly how websites see your browser and device, providing the technical details developers need for compatibility testing, support teams need for troubleshooting, and everyday users need when reporting issues. Whether you are verifying your browser is up to date, checking compatibility with a web application, or providing technical details to a support team, this tool delivers accurate browser identification in a single glance.

Key Features of Our Browser Detection Tool

Instant Browser Identification

Automatically detects your browser name and exact version number the moment the page loads. Identifies all major browsers including Chrome, Firefox, Safari, Edge, Opera, and Brave along with less common browsers and specialized browsing clients.

Operating System Detection

Identifies your operating system and version with precision, covering Windows, macOS, Linux distributions, ChromeOS, Android, iOS, and iPadOS. Reports the specific OS version to help determine software compatibility and support requirements.

User Agent String Display

Shows your complete raw user agent string as transmitted to web servers, along with a parsed breakdown explaining each component. Useful for developers debugging user agent-dependent features or administrators configuring content delivery rules.

Screen and Viewport Resolution

Reports both your display's native screen resolution and the current browser viewport dimensions in pixels. This dual measurement reveals how much screen space your browser content area actually occupies after accounting for browser interface elements.

JavaScript and Cookie Status

Verifies whether JavaScript execution and cookie storage are enabled in your browser. These are essential technologies for modern web applications, and knowing their status helps troubleshoot websites that require them for full functionality.

Rendering Engine Identification

Identifies the browser rendering engine powering your web experience, whether Blink for Chromium-based browsers, Gecko for Firefox, or WebKit for Safari. Engine identification explains rendering behavior differences across browser families.

Device Type Classification

Classifies your device as desktop, tablet, or mobile based on user agent analysis and screen characteristics. This classification mirrors how websites determine which version of their content to serve you through responsive design breakpoints.

One-Click Information Sharing

Copy all detected browser information to your clipboard with a single click for easy sharing with support teams, developers, or colleagues. The formatted output includes all detected details in a clean, readable format suitable for support tickets.

How to Use the What Is My Browser Tool

01

Step 1

Open the What Is My Browser tool page in the web browser you want to identify and your information appears automatically on screen.

02

Step 2

Review the primary detection panel showing your browser name, version number, operating system, and device type identification.

03

Step 3

Check the screen resolution and viewport dimensions section to see your display size and active browser content area measurements.

04

Step 4

Examine the full user agent string and its parsed components to understand exactly what information your browser sends to websites.

05

Step 5

Verify that JavaScript and cookies are enabled by checking the technology support indicators displayed in the results panel.

06

Step 6

Use the copy button to capture all browser details at once for pasting into support tickets, bug reports, or team communications.

Ready to Analyze?

Try What is My Browser now — completely free, no registration required

Use Tool Now

What Is the What Is My Browser Tool?

The What Is My Browser tool is a web-based utility that detects and displays detailed information about the web browser and device you are currently using to access the internet. Every time your browser connects to a website, it transmits a user agent string, a text identifier that tells the server which browser you are using, its version number, your operating system, and other technical details about your device. Our tool intercepts and decodes this information, presenting it in a clear, human-readable format.

User agent strings were originally designed to help web servers deliver content optimized for different browsers. However, over the decades they have become increasingly complex and difficult to read. A modern user agent string might look like this: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36. Without a decoder, extracting meaningful information from this string requires technical knowledge. Our tool does the parsing automatically.

Beyond the user agent string, the What Is My Browser tool detects additional technical details about your browsing environment:

  • Browser name and exact version number including the major, minor, and patch version for precise identification
  • Operating system and version such as Windows 11, macOS Sonoma, Ubuntu 22.04, Android 14, or iOS 17
  • Screen resolution and viewport dimensions showing both your display's native resolution and the browser window size
  • JavaScript and cookie support status confirming whether essential web technologies are enabled in your browser
  • Rendering engine identifying whether your browser uses Blink, Gecko, WebKit, or another layout engine
  • Device type classification distinguishing between desktop computers, tablets, and mobile phones

This information is invaluable for web developers testing cross-browser compatibility, IT support teams diagnosing user issues, and anyone who needs to quickly communicate their technical environment to another person. Rather than navigating through browser settings menus and system information panels, this tool consolidates everything into one accessible report instantly upon page load.

The tool works entirely client-side, meaning your browser information is detected locally without transmitting sensitive data to external servers. This approach ensures privacy while delivering accurate, real-time results that reflect your current browsing configuration.

Why Browser Detection Matters

Understanding your browser environment is important for far more than satisfying curiosity. Browser detection plays a critical role in web development, technical support, security, and everyday internet usage. Here is why knowing your browser details matters across different contexts.

Web Development and Cross-Browser Compatibility: Web developers must ensure their websites and applications work correctly across dozens of browser and operating system combinations. Different browsers interpret HTML, CSS, and JavaScript in subtly different ways, and even minor version differences can introduce rendering bugs or functionality issues. Knowing the exact browser version helps developers reproduce and fix compatibility problems reported by users.

Technical Support and Issue Resolution: When you contact technical support for a website or web application, one of the first questions you will be asked is which browser and version you are using. This information helps support teams determine whether your issue is browser-specific, whether your browser version is supported, and whether a known bug in that version might be causing your problem. Having this information ready speeds up the support process significantly.

Security and Update Verification: Outdated browsers contain unpatched security vulnerabilities that attackers actively exploit. Knowing your exact browser version allows you to verify whether you are running the latest release with all security patches applied. This is particularly important in enterprise environments where browser updates may lag behind due to IT policies or compatibility requirements with internal applications.

Responsive Design Testing: Screen resolution and viewport dimensions directly affect how responsive websites display content. Designers and developers testing responsive layouts need to know the exact dimensions their browser reports to understand why a design may break at certain sizes. The What Is My Browser tool provides both the screen resolution and the actual browser viewport size, which often differ due to browser chrome, taskbars, and other interface elements.

Website Access and Compatibility Requirements: Some websites and web applications have minimum browser requirements. Banking portals, government services, and enterprise applications may require specific browser versions for security or functionality reasons. Quickly checking your browser version determines whether you meet these requirements before encountering access errors or broken functionality.

User Agent Analysis for Website Operators: Website operators analyze user agent data from their analytics to understand their audience's technology profile. This data informs decisions about which browsers to prioritize for testing, when to drop support for legacy browsers, and how to allocate development resources across different platforms and devices.

Who Should Use the What Is My Browser Tool?

The What Is My Browser tool serves a wide range of users who need quick, accurate browser and device identification for various professional and personal purposes.

Web Developers and Front-End Engineers: Developers building websites and web applications use browser detection constantly during testing. When a user reports a visual glitch or broken functionality, the first step is identifying their browser and version. Developers also use this tool on their own testing devices to confirm which browser versions they are testing against, especially when using multiple browser profiles or virtual machines.

IT Help Desk and Support Teams: Technical support professionals deal with browser-related issues daily. Instructing a non-technical user to find their browser version through settings menus is time-consuming and error-prone. Directing them to this tool provides instant, accurate results that the user can share via screenshot or copy-paste, eliminating confusion and accelerating issue resolution.

Quality Assurance Testers: QA professionals testing web applications across multiple browsers and devices need to document their testing environment precisely. The What Is My Browser tool provides a standardized way to capture browser information for test reports, ensuring that test results can be accurately attributed to specific browser and OS combinations for reproducibility.

Digital Marketers and Content Creators: Marketers verifying that landing pages, email templates, and advertising creatives render correctly across different browsers use this tool to confirm their current testing environment. Understanding viewport dimensions is especially important for marketers reviewing how responsive designs adapt to different screen sizes.

Non-Technical Users: Everyday internet users who need their browser information for software compatibility checks, website access requirements, or when asked by a support agent benefit from the simplicity of this tool. No technical knowledge is needed because all detection happens automatically and results are displayed in plain language that anyone can understand and communicate.

Security-Conscious Users: Users who want to verify that their browser is up to date with the latest security patches use this tool for a quick version check. Comparing the detected version against the latest release version reveals whether updates are needed to close known security vulnerabilities.

Understanding Your Browser Detection Results

The results from our What Is My Browser tool contain several technical data points. Here is a breakdown of what each element means and why it matters for your specific use case.

Browser Name and Version: The browser name identifies the software application you are using to access the web, such as Google Chrome, Mozilla Firefox, Apple Safari, or Microsoft Edge. The version number follows semantic versioning, with major version indicating significant feature releases and minor or patch versions indicating incremental updates and bug fixes. Knowing the exact version is critical because browser behavior can change significantly between major versions.

Operating System: Your operating system is the foundational software running on your device. Browser behavior can vary across operating systems even for the same browser version because OS-level features like font rendering, GPU acceleration, and input handling differ between Windows, macOS, Linux, and mobile platforms. OS information is essential for reproducing platform-specific bugs.

User Agent String: This raw text string is what your browser actually sends to every website you visit in the HTTP request headers. It contains encoded information about your browser, OS, rendering engine, and device capabilities. While modern browsers are phasing in reduced user agent strings for privacy, the full string remains available through JavaScript detection used by our tool.

Screen Resolution vs Viewport: Screen resolution represents the total pixel dimensions of your display hardware, while viewport represents the actual content area available within your browser window. These typically differ because the browser toolbar, operating system taskbar, and any sidebar panels reduce the available content area. Responsive web designs use the viewport dimensions, not screen resolution, to determine layout breakpoints.

Rendering Engine: The rendering engine determines how your browser interprets and displays web content. Blink powers Chrome, Edge, and Opera. Gecko powers Firefox. WebKit powers Safari. Knowing the engine explains why different browsers may render the same web page slightly differently and helps developers target engine-specific CSS or JavaScript workarounds.

Best Practices for Browser Management and Compatibility

Maintaining an up-to-date and properly configured browser is essential for security, performance, and compatibility with modern websites. Follow these best practices to ensure the best browsing experience.

Keep Your Browser Updated: Browser updates contain critical security patches, performance improvements, and new web standard support. Enable automatic updates or check for updates regularly. Running an outdated browser exposes you to known vulnerabilities and may cause modern websites to malfunction. Use our What Is My Browser tool periodically to verify you are on the latest version by comparing your detected version against the browser vendor's release notes.

Understand Your User Agent String: Your user agent string reveals significant information about your system to every website you visit, including your OS version, browser version, and device type. While this data helps websites serve appropriate content, it also creates a partial fingerprint of your browsing environment. Privacy-focused users should be aware of what their user agent reveals and consider browser extensions that can modify or standardize this string if anonymity is a priority.

Test Across Multiple Browsers: If you build or manage websites, never assume that what works in one browser works in all browsers. Maintain a testing workflow that covers the major browser families including Chromium-based browsers, Firefox, and Safari. Use our tool on each testing browser to document the exact versions being tested, creating a clear record for quality assurance reports.

Verify Browser Configuration for Web Applications: Many web applications require JavaScript to be enabled, cookies to be accepted, and sometimes specific browser extensions to be installed or disabled. Before troubleshooting issues with a web application, check that your browser configuration meets the application's requirements. Our tool quickly confirms JavaScript and cookie status without requiring you to dig through browser settings.

Monitor Browser Market Share for Development Priorities: If you develop websites, track your audience's browser distribution through analytics tools. This data should inform which browsers you prioritize for testing and optimization. There is no value in spending hours optimizing for a browser that represents less than one percent of your traffic. Focus your cross-browser testing efforts where your actual users are concentrated.

Use Browser Developer Tools: Every modern browser includes built-in developer tools accessible through F12 or right-click and Inspect. These tools allow you to simulate different screen sizes, throttle network connections, and test your site in device emulation mode. Combined with the What Is My Browser tool for baseline information, developer tools provide a comprehensive environment for diagnosing and resolving browser-specific issues.

Clear Browser Data Periodically: Accumulated cache files, cookies, and browsing data can cause unexpected behavior on websites that have been updated. If you experience strange rendering or functionality issues on a previously working website, clearing your browser cache and cookies often resolves the problem. Our tool can help confirm that cookies are re-enabled after clearing if you accidentally changed your browser settings during the process.

Frequently Asked Questions

Everything you need to know about What is My Browser

Knowing your browser and version is essential when reporting technical issues to support teams, verifying that your browser meets website requirements, ensuring you have the latest security updates installed, and helping developers reproduce bugs. Many websites and applications have minimum browser version requirements that you need to verify.

A user agent string is a text identifier that your browser sends to every website you visit as part of the HTTP request headers. It contains encoded information about your browser name, version, operating system, rendering engine, and device type. Websites use this string to serve appropriate content and optimize their display for your specific browser.

Most modern browsers update automatically in the background. To check manually, open your browser settings or about page. In Chrome, go to Settings then About Chrome. In Firefox, go to Settings then General and check for updates. In Safari, browser updates come through macOS System Settings. In Edge, go to Settings then About Microsoft Edge.

Your screen resolution represents the total pixel dimensions of your physical display, while viewport size represents only the content area within your browser window. The difference accounts for browser toolbars, address bars, bookmark bars, scrollbars, the operating system taskbar, and any other interface elements that reduce the available area for web page content.

Yes, the What Is My Browser tool works on all mobile browsers including Chrome for Android, Safari for iOS, Firefox Mobile, Samsung Internet, and Opera Mobile. It detects your mobile browser version, mobile operating system, screen resolution, and device type. The tool automatically adjusts its display for mobile screens.

A rendering engine is the core software component that interprets HTML, CSS, and JavaScript to display web pages visually. Blink powers Chrome and Edge, Gecko powers Firefox, and WebKit powers Safari. The rendering engine determines how your browser displays web content, and differences between engines can cause visual variations across browsers.

Yes, every website you visit can access the same information displayed by our tool through your user agent string and JavaScript APIs. This includes your browser name and version, operating system, screen resolution, viewport dimensions, and enabled features. This is standard web functionality that enables websites to serve appropriate content for your device.

Yes, outdated browsers are a significant security risk. Browser vendors regularly release updates that patch discovered security vulnerabilities. Running an old browser version means those vulnerabilities remain unpatched on your device, making you susceptible to malware, phishing attacks, and data theft through exploits that target known browser weaknesses.

Related SEO Tools

Explore other tools to improve your SEO strategy

What is My IP Address

Instantly find your public IP address and geolocation details

Responsive Design Checker

Test how your website looks on different screen sizes and devices

Popular

Page Speed Checker

Test your page loading time and performance metrics