FingerprintJS
An open-source browser fingerprinting library that generates a unique visitor identifier from browser attributes, even in incognito mode.
What is FingerprintJS?
FingerprintJS is an open-source JavaScript library that generates a unique visitor identifier by collecting and hashing browser and device attributes. It solves the problem of tracking users across incognito or private browsing sessions where traditional methods like cookies fail, providing a persistent identifier based on browser characteristics.
Developers and organizations needing client-side visitor identification for analytics, fraud prevention, or user tracking, especially in scenarios where cookie-based tracking is insufficient or blocked.
Developers choose FingerprintJS because it's a free, open-source alternative to commercial fingerprinting services, offering easy integration, incognito mode support, and data persistence without server dependencies, though with lower accuracy than server-side solutions.
Overview
The most advanced free and open-source browser fingerprinting library
Use Cases
Best For
- Tracking users across incognito or private browsing sessions
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