What your browser reveals
Every website you visit can read a surprising amount about your browser and device without asking. Put together, it can recognise you even with cookies switched off. This page shows you what it sees.
Nothing is stored or sent. The checks run in your own browser and the results are shown only to you. This page also tells your browser to block every network request. The second table shows what the server receives with any page request. Here it is displayed back to you and not kept or logged.
Your fingerprint ID
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What your browser hands over automatically
| Detail | What a website can read | How identifying | Why it matters |
|---|
"Identifying" means how much a detail helps tell you apart from other people. No single detail identifies you; the combination does.
What the server sees with every request
Before any script runs, your browser sends these details with every page you load. They are visible to the website, and often to the companies whose ads and trackers are on it.
| Sent by your browser | Value |
|---|---|
| Your IP address | 216.73.216.125 |
| Browser and system | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
| Languages you accept | (nothing sent) |
| Page you came from | (nothing sent) |
| Encodings you accept | gzip, br, zstd, deflate |
| Do Not Track signal | (nothing sent) |
| Global Privacy Control | (nothing sent) |
| Browser brand hints | (nothing sent) |
| Operating system hint | (nothing sent) |
Your IP address shows roughly where you are and who your internet provider is. A VPN or Tor changes it. See Am I on Tor?. If this page is behind a proxy or CDN, the address shown may be theirs.
How to reduce what you reveal
- Use a browser built to resist fingerprinting. Tor Browser and Mullvad Browser make every user look alike, which is the strongest defence. Firefox has a resist-fingerprinting setting, and Brave adds noise to the trackable signals. See Resources.
- Blend in rather than customise. Every unusual font, extension or setting makes you more unique. Fewer add-ons and default window sizes help.
- Block trackers with a content blocker so fingerprinting scripts never run at all. See Online Privacy.
- Turn on Global Privacy Control in browsers that support it.
- To see how unique your browser is against real data from other visitors, the EFF's Cover Your Tracks gives a score. It works by sending your details to the EFF, so it is not part of this private page.
What this check cannot do
- It cannot tell you exactly how unique you are, because that needs data from many other visitors. It shows what is exposed, and how each detail matters.
- It does not test for IP leaks through your browser (WebRTC), which would need contacting an outside server. A dedicated leak test on the Resources page can do that.
- Real trackers use more signals than this page reads, such as sound and battery details, and they combine them with your behaviour and accounts.