Discover what your browser reveals about your device and identity. This tool collects the same information that websites use to fingerprint and track visitors — including user agent, screen resolution, timezone, WebGL renderer, canvas hash, and more. A privacy score shows how unique and trackable your setup is.
All data stays in your browser — nothing is sent to any server.
Browser fingerprinting is a technique used to identify and track users based on the unique combination of technical details their browser reveals. Unlike cookies, which can be deleted, a fingerprint is derived from your device's hardware and software configuration — making it much harder to avoid. Websites, advertisers, and analytics services use fingerprinting to track visitors across sessions without storing anything on the device.
Understanding your fingerprint is the first step toward protecting your privacy. Just as you secure your home WiFi and hide browsing from your ISP, reducing your fingerprint makes it harder for websites to track your online activity.
The fingerprint checker above collects the same data points that tracking scripts use. Here is why each one matters:
| Data Point | Why It Matters | Trackability |
|---|---|---|
| User Agent | Reveals browser, version, and OS — highly specific | High |
| Screen Resolution | Combined with pixel ratio, narrows down device type | Medium |
| WebGL Renderer | Reveals exact GPU model — very unique | High |
| Canvas Hash | Rendering differences create unique per-device signatures | High |
| Timezone | Narrows geographic location to a region | Medium |
| CPU Cores | Combined with memory, identifies hardware class | Medium |
| Installed Plugins | Unique combinations create distinctive profiles | High |
| Language/Fonts | Language settings and font availability vary by locale | Medium |
Pro Tip: The combination of data points matters more than any individual one. While millions of people share the same screen resolution, the combination of your exact user agent, GPU, language, timezone, and canvas hash is often unique. To reduce your fingerprint, use a mainstream browser with default settings — unique configurations paradoxically make you more identifiable. Also use a VPN on your router to mask your IP address.
Canvas fingerprinting is one of the most effective tracking techniques. It works by drawing invisible graphics using the HTML5 Canvas API. The exact pixel values differ between devices due to variations in GPU hardware, graphics drivers, operating system font rendering, and anti-aliasing algorithms. The resulting image is hashed to create a device-specific identifier.
// Simplified canvas fingerprinting example
var canvas = document.createElement("canvas");
var ctx = canvas.getContext("2d");
ctx.font = "18px Arial";
ctx.fillText("Test string", 10, 25);
var hash = canvas.toDataURL(); // This varies per deviceCanvas fingerprinting works because even tiny differences in rendering — a single pixel value being 127 instead of 128 — produce a different hash. Modern anti-fingerprinting browsers add random noise to canvas output to defeat this technique.
Audio fingerprinting uses the Web Audio API to process audio signals and extract hardware-specific characteristics. The audio processing pipeline varies between devices due to different audio hardware, drivers, and operating system audio stacks. Like canvas fingerprinting, the resulting values create a unique identifier.
This technique is particularly difficult to defend against because it requires no user interaction and produces no visible or audible output. The audio context processes a signal entirely in memory and the minor floating-point differences become a fingerprint.
Complete protection from fingerprinting is difficult, but you can significantly reduce your trackability with these steps:
webgl.disabled to true in about:config (may break some sites).Understanding the difference between fingerprinting and cookie-based tracking helps you choose the right privacy measures:
| Feature | Cookies | Fingerprinting |
|---|---|---|
| Storage | On your device | No local storage needed |
| User control | Can delete/block easily | Very difficult to prevent |
| Persistence | Until deleted or expired | As long as hardware/software unchanged |
| Detection | Visible in browser settings | Invisible to users |
| Legal status | Regulated (GDPR cookie consent) | Regulatory gray area |
| Accuracy | Exact (unique ID stored) | Statistical (probabilistic matching) |
For comprehensive privacy, protect against both. Use your browser's built-in cookie controls and pair them with network-level protection like a guest network for untrusted devices and encrypted DNS.
While browser fingerprinting happens at the application level, many privacy protections are most effective at the network level — on your router:
The legal status varies by jurisdiction. Under GDPR, fingerprinting is considered personal data processing and typically requires consent. In the US, there are fewer specific regulations. Many privacy-conscious companies avoid fingerprinting, while advertising networks use it extensively. The regulatory landscape is evolving.
You can check individual data points using browser DevTools (console: navigator.userAgent, screen.width, etc.). However, our tool combines all data points into a single view with privacy scoring, which is more useful for understanding your overall trackability.
No. Incognito mode only prevents cookies and history from being saved locally. Your device fingerprint is identical in normal and incognito mode because the same hardware and software is used. Fingerprinting specifically targets this gap in privacy browsing.
A VPN hides your IP address but does not affect your browser fingerprint. IP address is one data point among dozens — you need both a VPN (for IP privacy) and anti-fingerprinting measures (for device privacy) to be fully protected.
Canvas rendering depends on the browser's rendering engine, GPU drivers, and OS graphics stack. Different browsers use different rendering pipelines, producing different canvas output. This is why canvas fingerprints can distinguish not just devices but also browsers on the same device.
Studies have shown that browser fingerprints are unique for 80-95% of users. The more unusual your configuration (rare OS, unusual screen resolution, many plugins), the more unique your fingerprint. Users with common setups (Windows, Chrome, 1920x1080) share fingerprints with a larger group.
Complete prevention is nearly impossible without breaking website functionality. Tor Browser comes closest by making all users look identical. For practical use, Firefox with Resist Fingerprinting (privacy.resistFingerprinting in about:config) provides strong protection while maintaining usability for most sites.
About Tommy N.
Tommy is the founder of RouterHax and a network engineer with 10+ years of experience in home and enterprise networking. He specializes in router configuration, WiFi optimization, and network security. When not writing guides, he's testing the latest mesh WiFi systems and helping readers troubleshoot their home networks.
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