Browser Fingerprint Test
Discover what data your browser reveals. View your canvas fingerprint, WebGL info, fonts, plugins, and uniqueness score.
How to Use the Browser Fingerprint Test
- Open the tool and it will automatically analyze your browser's fingerprint.
- Review each fingerprinting category: canvas, WebGL, audio context, fonts, screen, and more.
- Check your uniqueness score to see how identifiable your browser configuration is.
- Review the recommendations to reduce your fingerprint and improve privacy.
What is Browser Fingerprinting?
Browser fingerprinting is a technique for identifying and tracking users by collecting unique characteristics of their browser and device configuration. Unlike cookies, which can be cleared or blocked, a browser fingerprint is generated from data your browser automatically exposes: screen resolution, installed fonts, timezone, WebGL renderer, canvas rendering behavior, audio context properties, supported MIME types, and dozens of other attributes. When combined, these create a highly unique identifier. Studies have shown that browser fingerprints can uniquely identify over 90% of browsers. The canvas fingerprint alone is highly distinctive because different GPU hardware and software stacks render graphics slightly differently. WebGL fingerprinting reveals your exact GPU model and driver version. AudioContext fingerprinting exploits hardware-level differences in audio signal processing. Even font enumeration can narrow identification, as the set of installed fonts varies significantly across systems. Browser fingerprinting raises serious privacy concerns because it is invisible to users and resistant to standard privacy measures. Clearing cookies does nothing against fingerprinting. Private browsing modes provide minimal protection. Anti-fingerprinting measures include using Tor Browser (designed to make all users look identical), Firefox's Enhanced Tracking Protection, browser extensions that randomize fingerprint values, and disabling JavaScript (which prevents most fingerprinting techniques but breaks most websites). Understanding your fingerprint is the first step toward making informed decisions about your online privacy.
Frequently Asked Questions
Yes. Browser fingerprinting collects hardware and software attributes that are exposed by your browser regardless of cookie settings. It works in private browsing mode and persists even after clearing all browser data. This is why it is considered a more persistent tracking method than cookies and is harder for users to control.
Most browser fingerprints are highly unique. Research from the EFF's Panopticlick project showed that over 83% of browsers had a unique fingerprint, rising to over 94% for browsers with Flash or Java enabled. The combination of canvas, WebGL, fonts, screen resolution, timezone, and other attributes creates a nearly unique identifier for most users.
The most effective approach is using Tor Browser, which standardizes fingerprint attributes across all users. Firefox's Enhanced Tracking Protection blocks many fingerprinting scripts. You can also disable WebGL, use common screen resolutions, limit installed fonts, and use browser extensions that randomize fingerprint values. However, some anti-fingerprinting measures can paradoxically make you more unique.
The legality varies by jurisdiction. Under GDPR, browser fingerprinting for tracking purposes requires user consent, similar to cookies. The ePrivacy Directive also covers device fingerprinting. In practice, enforcement has been limited. Many websites use fingerprinting for fraud detection and security (legitimate interest), which may not require explicit consent.