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Frequently Asked Questions

What does PrivacyTestLab actually test?

PrivacyTestLab runs browser-based privacy checks that show you exactly what information your browser and network expose to websites and third-party trackers — often without you realizing it.

The platform covers four areas of browser privacy:

• IP & Location Exposure: Checks your public IPv4 and IPv6 addresses, detects split-tunnel VPN failures, and identifies whether your real location is visible despite an active VPN.
• Browser Fingerprinting: Analyzes how uniquely identifiable your browser is based on screen resolution, hardware features, and configuration — the method trackers use to follow you without cookies.
• DNS & WebRTC Leaks: Tests your DNS configuration to check whether your browsing activity is visible to your ISP, and checks WebRTC to confirm it isn't bypassing your VPN's encryption.
• Speed & Security Utilities: Includes latency and jitter diagnostics, internet speed testing, and a client-side password strength checker that evaluates credentials without sending anything to a server.

All tests run directly inside your browser tab — nothing is installed, no data is stored, and results reflect your actual connection state at the time of testing.

Is PrivacyTestLab free to use? Are there any hidden catches?

Yes, PrivacyTestLab is 100% free to use. There are no premium paywalls, no hidden subscriptions, and absolutely no account registration or email sign-ups required to access our security diagnostics.

Unlike platforms that force you to download sketchy third-party desktop applications or browser extensions—which can ironically introduce new spyware risks—all of our privacy utilities run entirely in your web browser.

Our mission is purely educational transparency. The diagnostic tools process your connection metadata locally in real-time to show you your tracking exposure, and we do not log, store, or monetize your network details. You get instant, unfettered access to our complete testing suite.

Do you store my IP address, logs, or browsing activity?

No. PrivacyTestLab operates under a strict, verifiable zero-logs data policy. We do not track, record, or store your IP addresses, search queries, or browsing history. Our system is built exclusively for real-time security analysis, not user profiling or data monetization.

Unlike typical websites that send your network data back to a centralized corporate database, our diagnostic platform processes your information entirely on the client-side within your own web browser.

Any network data or metadata required to detect your leak exposure is held temporarily in your browser's volatile memory and is instantly destroyed the moment you close or refresh the browser tab. Our infrastructure is architected from the ground up to expose digital tracking vulnerabilities—not to create new privacy risks for our users.

Why does my VPN leak my real IP address via WebRTC?

A WebRTC leak happens because of a direct conflict between how your web browser talks to websites and how your VPN hides your internet footprints. WebRTC (Web Real-Time Communication) is a built-in technology that allows browsers to connect directly to each other for things like voice calls, video chats, and file sharing without needing an intermediate server to pass the data back and forth.

To make these fast connections work, your browser acts like a digital detective. It sends out a special request to find the shortest pathway to the other device. The problem is that this request operates right inside your browser app, allowing it to sneak past your operating system's standard VPN protection. It looks directly at your physical device's hardware, uncovering your true home internet address (IP address) and your local network details.

If your VPN software doesn't have a specific feature called "built-in leak protection," it won't notice that the browser is communicating outside of its secure, encrypted tunnel. When this happens, a website can use a simple piece of background code to trick your browser into giving up your real location, completely ignoring the fact that your VPN is turned on.

To see if your browser is quietly giving away your identity behind your back, you can instantly check your system using our WebRTC Leak Test. You can also make sure your regular connection is fully masked with our IP Leak Test, and ensure your internet provider isn't tracking the websites you visit by running our DNS Leak Test.

Can websites still track me if I block or delete cookies?

Yes, absolutely. While clearing your browser cookies used to be enough to reset your online identity, modern tracking companies now rely heavily on advanced cookieless tracking methods. If you delete your cookies, trackers simply shift to alternative scripts that look at your network and hardware characteristics instead of your browser files.

The most aggressive alternative is browser fingerprinting. When you load a webpage, the site can instantly measure your specific screen resolution, installed operating system, device language, system time zone, and even the way your hardware renders complex graphics. Combined, these technical data points create a highly accurate, unique digital signature that doesn't rely on a tracking file sitting on your hard drive.

Additionally, websites utilize your browser's local storage capabilities (HTML5 Web Storage), which operates silently in the background and isn't wiped out by standard cookie-clearing tools. They can also log your structural IP network reputation to track your approximate location across different browsing sessions.

Because these background monitoring systems bypass traditional privacy blocks, our diagnostic suite uses specialized, real-time tracking emulation algorithms to show you exactly which hardware and network flags your browser is revealing. Running our diagnostic tools ensures you aren't leaving a predictable tracking trail behind you, giving you total transparency over your device's security layout.

How accurate are the privacy tests on PrivacyTestLab?

The tests read live data directly from your browser and network at the moment you run them — not from cached results, estimated profiles, or static databases. This means what you see reflects your actual current exposure, not a generic assessment of your browser type.

Accuracy comes from two things:

• Server-side network checks: For IP and DNS tests, your browser communicates with backend servers to detect what your real network identity looks like from the outside — the same way a website you visit would see it.
• Direct browser API reads: For fingerprinting and WebRTC tests, the tools query your browser's own APIs for canvas rendering, media devices, and storage — reading exactly what those APIs expose, nothing more.

Results can vary depending on your active browser extensions, VPN configuration, or browser settings at the time of testing — which is expected behavior, not a flaw. If you change your setup, running the test again will reflect that change immediately. The tools are kept updated to stay consistent with current browser standards and how real tracking systems work.

For the browser fingerprint score specifically, we don't ask you to just trust a number — the exact Shannon entropy formulas, per-signal weights, and open-source scoring code are published in full on our Methodology page.

Can any privacy tool guarantee 100% complete online anonymity?

No. No single tool can guarantee complete anonymity online. Modern tracking systems don't rely on one data point — they combine IP addresses, cookie data, network metadata, and browser configuration properties to build a persistent profile of your device across sites.

Meaningful privacy requires a layered approach. Even with a VPN active, a website can still identify you through your browser's font list, audio hardware fingerprint, or active login sessions on other platforms. Privacy is an ongoing combination of browser settings, network encryption, and browsing habits — not a one-click fix.

PrivacyTestLab exists to show you exactly where your current setup is leaking before a tracker finds it first. Rather than making claims about how protected you are, these tools give you the raw data — what your IP looks like from the outside, what your browser fingerprint reveals, whether your DNS queries are exposed — and let you decide what to fix. You can also review our Privacy Policy to see exactly how this site handles your data while you run these tests.