🖥️ Browser & Device Profile
Your complete browser fingerprint — detected instantly in your browser
About the Browser & Device Profile Tool
The ToolNestr Browser and Device Profile tool instantly reveals everything your browser exposes about your device and environment. No software installation, no sign-up, no plug-ins — every data point is read directly from browser APIs and displayed in real time. This tool is useful for web developers testing responsive designs, for security-conscious users who want to understand what websites know about them, and for technical support teams gathering system information from end users quickly.
Modern web browsers expose a surprisingly large amount of information to websites through standard JavaScript APIs. While none of this data uniquely identifies you on its own, combinations of these characteristics can form a "browser fingerprint" that is statistically unique to your device and browser configuration. Understanding what your browser broadcasts helps you make informed decisions about browser privacy settings and extensions.
Browser and operating system detection
The tool detects your browser name and version, rendering engine (Blink, Gecko, or WebKit), and operating system — including the specific version where available. Browser and OS detection uses the User-Agent string and modern browser API features rather than unreliable string parsing alone. The full raw User-Agent string is also displayed and can be copied to the clipboard with a single click, which is useful when filing bug reports or checking compatibility tables.
Hardware and performance data
The hardware section shows the number of logical CPU cores available through the navigator.hardwareConcurrency API, and the device memory in gigabytes through navigator.deviceMemory (where supported by the browser). Touch support detection reports the maximum number of simultaneous touch points your device supports. These values help developers understand the performance tier of a user's device without requiring any special permissions.
Screen and display metrics
Screen resolution shows the total pixel dimensions of your display, while the Device Pixel Ratio (DPR) indicates how many physical pixels correspond to each CSS pixel. A DPR of 2 indicates a Retina or HiDPI display; a DPR of 1 indicates a standard display. Color depth shows how many bits per pixel your display supports — 24-bit is standard for modern displays, enabling over 16 million colours. The viewport section shows the current browser window dimensions and updates in real time as you resize the window, which is useful for testing responsive breakpoints.
Network and connectivity information
The Network API, where supported, reports your connection type (4G, WiFi, Ethernet, etc.), estimated effective bandwidth in megabits per second, and round-trip time in milliseconds. This information helps developers build adaptive applications that serve different content quality based on connection speed. The online status indicator shows whether your browser currently has a network connection.
Timezone and locale settings
The tool detects your browser's timezone (as an IANA timezone identifier such as America/New_York), your UTC offset in hours, and the list of languages configured in your browser in preference order. These values are commonly used by websites for localisation — displaying dates in the correct timezone, formatting numbers and currencies, and selecting the appropriate language for content. Your primary language is the first value in the language list and typically corresponds to your operating system's primary language setting.
Privacy and data handling
All data collection and processing happens entirely within your browser. Nothing is sent to any server. The tool reads values from standard browser APIs — the same APIs that any website you visit can access — and displays them on screen for your reference. No data is stored between sessions. Refreshing or closing the page removes everything, and no cookies or local storage are used.