Browser Fingerprint
A browser fingerprint is a unique profile built from your device and browser attributes that sites use to identify and track you even without cookies.
Browser Fingerprint explained
A browser fingerprint is assembled from dozens of signals your browser exposes: user agent, screen size, installed fonts, time zone, language, hardware details, and rendering quirks in canvas, WebGL, and audio. Combined, these attributes are often unique enough to single out one device.
Because it needs no cookies, fingerprinting is a powerful tracking and anti-fraud technique. It is also the reason multi-accounting requires an antidetect browser: to run several identities safely, each profile must present a different, internally consistent fingerprint.
Examples
- 01A site recognizing a returning visitor who cleared all cookies
- 02Two accounts getting linked because they share one fingerprint
- 03An anti-fraud system flagging a mismatched, spoofed fingerprint
Common use cases
Frequently asked questions
It is a profile of your device built from browser and hardware attributes like user agent, fonts, screen size, and rendering signatures, often unique enough to identify you without cookies.
Yes. Incognito clears cookies but does not change your fingerprint, so sites can still recognize the same device across private sessions.
They spoof the exposed attributes per profile and keep them internally consistent, so each identity looks like a distinct real device rather than the same one.
The combination of many attributes. Any single value is common, but together they form a pattern that is frequently unique across the entire web.
Anti-fraud systems flag mismatches, such as a mobile user agent with a desktop screen size. A believable spoof must keep every value plausible and coherent.
You can reduce distinctiveness by using common configurations and blocking some APIs, but the durable approach for multi-accounting is a purpose-built antidetect browser.
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