BrowserSpy.dk shows you just how much information can be retrieved from your browser just by visiting a page.
Available tests are listed below.
Browser information and privacy tests
What can a website find out about your browser? BrowserSpy.dk is a free collection of browser information and privacy tests. Check your browser and operating system, view your IP address and HTTP headers, and explore the features your browser exposes to websites.
Start with these browser tests
- Browser information — see the browser name, version and reported capabilities.
- IP address and hostname — check the network address seen by the web server.
- HTTP request headers — inspect the information your browser sends with a request.
- Screen information — view screen dimensions, color depth and other display properties.
- Cookie support — check cookie behavior and the cookies available to this site.
- Geolocation support — test location access using your browser's permission prompt.
Understand what your browser reveals
Websites receive some information automatically, such as HTTP headers and the IP address used to connect. JavaScript can read additional browser properties, while features such as precise geolocation require your permission. Use these tests to see what your current browser reports and compare the results after changing its settings.
Results depend on your browser, device and privacy protections. An unavailable value can mean a feature is unsupported, blocked or restricted; these tests are diagnostics, not a complete security or anonymity assessment.
Explore current and historical browser features
Browse the test menu or the full list of browser tests for JavaScript, languages, storage, image formats and more. BrowserSpy.dk also preserves historical tests for Flash, Java applets and other plugins. Those tests may be unavailable in modern browsers.
Learn more about BrowserSpy.dk or visit the frequently asked questions for help interpreting the site.