Fingerprint | Identify Every Web Visitor & Mobile Device
The Fingerprint device intelligence platform works across web and mobile applications to identify all visitors with industry-leading accuracy — even if they’re anonymous.
Categories:
FingerprintJS is the most advanced open-source browser fingerprinting library and a SaaS device intelligence platform that identifies unique web visitors and mobile devices to prevent fraud without relying on cookies.
🚀 Overview
FingerprintJS provides stable, persistent visitor identifiers by analyzing over 100 browser and device signals, solving the problem of anonymous fraud, bots, account takeovers, and unreliable tracking in a cookie-less world.
It is built for developers integrating into web and mobile apps, and businesses in fintech, e-commerce, and beyond who need real-time fraud prevention and user trust enforcement.
The FingerprintJS team built it as the original, most accurate client-side fingerprinting solution, evolving into a full platform with server-side Pro features for enterprise-scale accuracy and signals like VPN detection and geolocation.
✨ Key Features
- Generates hashed
visitorIdfrom browser attributes, persistent in incognito mode and after data purge (99.5% accuracy in OSS, 99.7% in Pro) - Pro signals: VPN/IP geolocation detection, browser tampering/bot detection, incognito mode, rooted devices, IP blocklists, high-activity identification
- Easy integration via CDN script or NPM, with SDKs for web, mobile (Android/iOS), and servers (Node.js, etc.)
- Real-time API (50M+ events/day), webhooks, supports 250+ countries; upcoming: enhanced mobile support
🛠 Tech Stack
- Frontend/Client: TypeScript/JavaScript (ES2018+), Rollup bundler, compatible with React/Vue/Angular
- Backend/Pro API: Proprietary cloud service with Node.js/Python/etc. SDKs
- Database: N/A for OSS library (client-side only)
- Auth: API keys for Pro dashboard
- Hosting: openfpcdn.io CDN for OSS, Fingerprint cloud for Pro
👥 Who Is This For?
This project is useful for:
- Developers who want to add cookie-less user identification and basic fraud signals
- Teams looking for scalable bot/fraud prevention in fintech, payments, e-commerce
- Indie makers building secure web/mobile apps without third-party trackers
📸 Screenshots / Demo
- Live demo: https://fingerprintjs.github.io/fingerprintjs
- Pro demo: https://demo.fingerprint.com/playground
- GitHub: https://github.com/fingerprintjs/fingerprintjs
🔥 Project Status
- 🟢 Actively building
Last updated: 2026-03-19
❓ FAQ
Is this project free?
Freemium / Open Source — OSS library fully free (MIT license), Pro SaaS offers free tier for visitor IDs/signals, paid enterprise plans for full features.
Is the source code available?
Yes — https://github.com/fingerprintjs/fingerprintjs (client library; Pro server-side is closed-source)
Can I contribute?
Yes — Follow CONTRIBUTING.md, submit issues/PRs on GitHub, join Discord community, or email oss-support@fingerprint.com for support.
📬 Contact & Links
- Website: https://fingerprintjs.com
- GitHub: https://github.com/fingerprintjs/fingerprintjs
- Twitter/X: https://x.com/FingerprintJS
- Email: oss-support@fingerprint.com
Built with ❤️ and kept warm on WarmIndex.
Similar apps
Magic Labs | The fastest way to build onchain
magic.link
We've onboarded 50 million people to the world's leading apps. We're trusted by over 200,000 developers. We're Magic.
BinShare.net Your Go-To Platform for Code and Binary Sharing
binshare.net
The best way to easily share blocks of code with proper formatting and coloring out syntax when asking for help online.
Deliver trusted data with dbt | dbt Labs
getdbt.com
dbt Labs empowers data teams to build reliable, governed data pipelines—accelerating analytics and AI initiatives with speed and confidence.
Pastes.io - Best Pastebin alternative
pastejustit.com
Need to share text or code fast? Pastes.io makes it easy to paste and share anything in seconds â no signup, no hassle, just simple and secure sharing.