FingerprintJS
FingerprintJS is a client-side browser fingerprinting library that provides a unique visitor identifier unaffected by incognito mode.
FingerprintJS is a client-side browser fingerprinting library that provides a unique visitor identifier unaffected by incognito mode.
Checked October 2026.
FingerprintJS is a source-available, client-side, browser fingerprinting library that queries browser attributes and computes a hashed visitor identifier from them. Unlike cookies and local storage, a fingerprint stays the same in incognito/private mode and even when browser data is purged.
License: Starting version 4.0.0, FingerprintJS is licensed under Business Source License 1.1. The BSL allows use only for non-production purposes. Use Case: Is a commercial license required? Exploring FingerprintJS for your own research, hobbies, and testing purposes - No. Using FingerprintJS to build a proof-of-concept application - No. Using FingerprintJS to build revenue-generating applications - Yes.
Using FingerprintJS to build software that is provided as a service (SaaS) - Yes. Forking FingerprintJS for any production purposes - Yes. To purchase a license for uses not authorized by BSL, please contact sales@fingerprint.com. Demo: Visit https://fingerprintjs.github.io/fingerprintjs to know your visitor identifier.
Now, try visiting the same page in private/incognito mode and notice how the visitor identifier remains the same! Getting Started: <script>
No core features are listed for this product yet, so check the vendor's documentation for the full feature list.
No integrations are listed for this product yet. Check the vendor's documentation, or ask the vendor which integrations and APIs it supports.
Common questions about FingerprintJS: features, pricing and alternatives.
FingerprintJS is a product in the Bot Management & CAPTCHA category. It covers Open Source, Browser Security and Fraud Detection.
FingerprintJS is free. Download and setup instructions are at https://github.com/fingerprintjs/fingerprintjs/.
Alternatives to FingerprintJS listed on CybersecTools:
Compare all FingerprintJS alternatives at https://cybersectools.com/alternatives/fingerprintjs
FingerprintJS is available as a cloud service. It is listed for startups, small businesses, mid-market companies and enterprises. It is free.
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