Browser Fingerprinting Explained: How Websites Track You
June 18, 2026ยท7 min read
You can clear cookies, switch to incognito, even change your IP โ and many websites will still recognise you. The reason is browser fingerprinting: a tracking technique that builds a near-unique ID from the technical details your browser leaks on every visit.
What goes into a fingerprint
No single value identifies you, but combined they're often unique among millions of users:
- Canvas fingerprint โ tiny rendering differences when your device draws hidden graphics.
- WebGL โ your GPU vendor and renderer string.
- Fonts โ the exact list installed on your system.
- Screen and window โ resolution, colour depth, pixel ratio.
- Audio stack โ how your device processes sound.
- User-agent, platform, languages and timezone.
- Hardware hints โ CPU cores, memory, touch support.
Why incognito doesn't help
Private/incognito mode only stops your browser from storing history and cookies locally. It does nothing to change the fingerprint you broadcast โ canvas, WebGL, fonts and the rest are identical. To a fingerprinting script, incognito you and regular you are the same device.
Why this matters for multi-account work
If you manage several accounts on the same platform, fingerprinting is exactly how those accounts get linked. Even with different logins, proxies and cleared cookies, a shared fingerprint tells the site "these are all the same machine" โ and that's a fraud signal that triggers bans.
How to stop browser fingerprinting
You can't simply turn the fingerprint off โ a browser with no fingerprint is itself suspicious. The effective approach is to present a different, realistic, consistent fingerprint per identity. That's what an antidetect browser does: each profile gets a complete fingerprint sourced from real devices and reused every session, so accounts look like genuinely separate people on separate machines.
Test your own fingerprint
Independent tools like coveryourtracks.eff.org and amiunique.org show how identifiable your current browser is. Run them once on your normal browser, then again inside an antidetect profile โ the difference is the whole point.
Ready to try it? Start your 7-day free trial โ no card required โ or see the full BulldogBrowser vs GoLogin comparison.
Frequently asked questions
Can browser fingerprinting track me without cookies?+
Yes. Fingerprinting builds an ID from your device's technical characteristics, so it works even after you clear cookies or use incognito.
How do I stop browser fingerprinting?+
Use a browser that presents a different, consistent, realistic fingerprint per profile. Antidetect browsers do this; ordinary privacy settings and incognito do not.
Does a VPN stop fingerprinting?+
No. A VPN only changes your IP. Your canvas, WebGL, fonts and other signals remain the same, so a fingerprint still identifies you.
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