Browser Privacy Checker
Hvad din browser afslører
Checking your browser…
Om dette værktøj
Every website you open can read dozens of details about your device without asking: your screen size, timezone, languages, graphics card, installed fonts and how your hardware draws text. None of these need a cookie or a permission prompt. Combined, they form a fingerprint that is often unique enough to follow you across sites, through private windows and after you clear your cookies.
This checker shows you exactly what that looks like for your browser, right now. Each signal comes with a plain-English risk rating and an explanation of why trackers care about it. At the top you get a combined fingerprint ID. Open this page in a private window, or after clearing cookies, and compare: if the ID is the same, so is the tracker's view of you.
Everything is computed locally in your browser. We do not log, store or send any of it. The one exception is the optional WebRTC leak test, which only runs when you click it, because it has to ask a public STUN server what your IP address is. That is exactly how a video-call site, or a tracker, would discover your real IP behind a leaky VPN.
Funktioner
- Combined fingerprint ID from all signals
- Canvas and WebGL (GPU) fingerprint detection
- Installed font detection
- Timezone, language, screen and hardware details
- Do Not Track and Global Privacy Control status
- Opt-in WebRTC IP leak test for VPN users
- Risk rating and explanation for every signal
- Computed locally - nothing is sent to us
Sådan bruger du det
- Open the page. The checks run instantly.
- Read the high-risk signals first. They are the most identifying.
- If you use a VPN, click Run WebRTC test and check whether your real IP shows up.
- Open the page in a private window and compare fingerprint IDs.
Alt sker inde i din browser med JavaScript og WebAssembly. Dine filer bliver aldrig uploadet, aldrig gemt og aldrig set af os.
Ofte stillede spørgsmål
Use a browser with built-in fingerprinting protection. Firefox with Enhanced Tracking Protection set to Strict, Brave and the Tor Browser all randomize or standardize the strongest signals like canvas and WebGL. Avoid stacking lots of exotic extensions, since each one can make you stand out more.
Not harmful, but almost every site ignores it, and it adds one more bit to your fingerprint. Global Privacy Control is the one worth enabling: it carries legal weight under the California Consumer Privacy Act and similar state laws.
Only if it is your real public IP while you are connected to a VPN. Addresses ending in .local are masked by your browser and harmless. If your home IP shows up behind a VPN, enable your VPN's WebRTC protection or disable WebRTC in your browser settings.
No. The values are calculated in your browser and disappear when you close the tab. The page makes no requests with this data. Read more in what your browser sends to every website.