Browser fingerprint checker
See the signals websites use to track you — and how unique your browser really is.
Every website you visit can read dozens of signals from your browser and device — without any cookies — and combine them into a fingerprint that re-identifies you across sites and sessions. This free tool runs entirely in your browser and shows you the exact signals a tracker would collect, plus an estimate of how unique (and therefore trackable) your browser is.
Run the test to see your fingerprint
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Fingerprint ID: not yet generated
Your fingerprint signals
These are the values your browser is exposing to every site you visit right now:
| Signal | Your value |
|---|---|
| Click “Check my fingerprint” above to populate these values. | |
This test runs 100% in your browser. None of these values are uploaded or stored — reload the page and they're gone.
What is a browser fingerprint?
A browser fingerprint is the combination of signals a website reads from your browser and device: your user agent, screen resolution, timezone, language, installed fonts, and the subtle ways your GPU and audio stack render content. Individually these seem harmless, but together they're often unique to one device in millions — which is exactly why advertisers and anti-fraud systems use them. Unlike cookies, you can't simply delete a fingerprint, and it survives incognito mode.
Does incognito or a VPN hide it?
No. Incognito mode only clears cookies and history for the session — your canvas, WebGL, fonts, timezone, and hardware fingerprint stay identical, so trackers still recognize the device. A VPN changes your IP address (one signal) but leaves every other signal untouched. Real protection means changing the fingerprint and the network path together, consistently, per identity.
The signals websites read
| Signal | Why it's identifying |
|---|---|
| Canvas | Your GPU and driver render the same text/shapes slightly differently — a near-unique hash. |
| WebGL | The GPU vendor, renderer string, and 3D rendering output narrow you down further. |
| Fonts | The exact set of fonts installed reflects your OS, apps, and language. |
| Timezone & language | Should match your IP's region; a mismatch is itself a flag. |
| Screen & hardware | Resolution, color depth, CPU cores, device memory, and touch support. |
| Audio | The AudioContext processes a signal with device-specific tiny variations. |
How Alias gives every profile a different fingerprint
You can't easily change a single browser's real fingerprint — it comes from your actual hardware and OS. Alias Browser solves it differently: each profile gets its own consistent fingerprint (canvas, WebGL, fonts, timezone, user agent, hardware hints), isolated cookies and storage, and a dedicated proxy or VPN. So every profile looks like a separate device on a separate network — and the accounts you run in them can't be linked. Unlimited profiles, zero telemetry, on macOS, Windows, and Linux.
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