What Does My Browser Reveal?
Every website you visit can learn a surprising amount about you without asking: roughly where you are, your device, your screen, your graphics card, even your battery. This page shows exactly what this visit gave away, how unique that makes your browser, and how to give away less.
What “checked on your device, nothing kept” means for this tool
Almost everything on this page is read inside your browser, on your own device, the same way any website could read it. None of it is sent to this website's server or to anyone else.
The one exception, on purpose: the “Your connection” box shows what a website's server sees about you. To show it, the page asks this site's server one question and the server answers with what it received: your IP address, the rough location and internet provider that the hosting network (Cloudflare) attaches to it, and your browser's request headers. The answer goes straight back to you. It is not saved or logged. Every website you visit gets these same details.
Nothing is kept. There is no database of visitors. The “how unique” score is an estimate worked out on your device from published research on how common each trait is, not by comparing you with other people.
Visit counting: this site counts visits with privacy-friendly analytics. No cookies, no ads, no tracking across other sites, and your IP address is not stored. It records which page you opened, your country, your device type, how long you stayed and when you download a result, never anything shown on this page.
How unique is your browser?
- 📍Looking up your rough location…
- 💻Checking your device and browser…
- 🎮Checking your graphics card…
- 🖥️Measuring your screen…
- 🔋Checking your battery…
- 🕒Reading your time zone…
What makes you stand out
Each trait narrows down who you could be. Rare traits narrow it more. The numbers are bits: every bit halves the crowd you blend into. Traits overlap (your graphics card and canvas drawing are related, for example), so the total is discounted. A rough estimate, not a measurement.
⌨️ Every key you press
While a page is open and in front, it can see every key you press on it: which key, exactly when, and how long you hold it. Try it: type in either box, or anywhere on this page. A password box hides the letters from people looking at your screen, not from the page itself.
What the page rebuilt from your keys
Your typing rhythm (how long you hold keys and the gaps between them) is personal enough that some companies use it to recognize people, a technique called keystroke dynamics. Pasted text is visible too. What a page can't see: keys typed in other tabs, other apps, or while this page isn't in front. Nothing here is saved or sent anywhere, and none of it goes in the report.
How to give away less
- Hide your IP address and location with a trustworthy VPN, or Tor Browser. Nothing else changes what the server sees.
- Use a browser that fights fingerprinting: Firefox (Settings → Privacy & Security → Strict), Brave, Safari or Tor Browser blur or randomize many of the traits on this page.
- Look like everyone else. Extra fonts, unusual languages, odd window sizes and lots of add-ons make you rarer. Keep the browser up to date and the window maximized.
- Block trackers with a content blocker such as uBlock Origin. Fingerprinting mostly happens inside ad and tracking scripts.
- Turn on Global Privacy Control (built into Brave, DuckDuckGo and Firefox's settings). In some US states sites must honor it as an opt-out of selling your data.
- Say no to permission pop-ups you don't need (location, notifications, camera). Check what's already allowed in the box below.
How to use the What Does My Browser Reveal?
- Open the page. The checks run by themselves in a second or two.
- Read your uniqueness score and the headline facts at the top.
- Look through each box to see what was revealed and why it matters.
- Follow the tips to give away less, then reload and compare.
Questions
What can a website see about me without asking?
Your IP address and the rough location and internet provider behind it, your device, system and browser, screen size, graphics card, time zone, languages, installed fonts and often your battery level. This page shows all of it for your own browser.
What is browser fingerprinting?
Combining many small details, such as your screen, fonts and graphics card, into an ID that recognizes your browser even without cookies and even in a private window.
How is the uniqueness score worked out?
On your device, from published research on how common each trait is. Rare traits count for more. There is no database of visitors, so it is an estimate, not a comparison with real people.
Does a VPN hide all of this?
No. A VPN changes your IP address and the location and provider that come with it. Everything else on the page comes from your browser and stays the same. A fingerprint-resistant browser hides more of that.
Is any of this saved?
No. The checks run in your browser. The connection box asks the server what it received and shows you the answer, and nothing is stored or logged.
Still stuck, or want a tool that isn't here? Ask on the Nebula Discord.