FingerprintJS Pro

About FingerprintJS Pro

FingerprintJS Pro is a device intelligence and visitor identification service. A client-side JavaScript agent (also available as native SDKs for iOS and Android, and framework integrations for React, Next.js, Preact, Vue, Nuxt, Angular, and Svelte) collects browser or device attributes and sends them to the Fingerprint backend, which returns a visitor_id for that browser or device. Server-side SDKs are available for Node.js, PHP, C#/.NET, Go, Java, and Python.

Beyond identification, the service provides Smart Signals: server-accessible insights such as bot detection, VPN detection, and browser tampering detection, retrievable via a Server API, webhooks, or Sealed Client Results. Identification events include data such as IP address, geolocation, ASN and datacenter information, browser and OS details, and a confidence score.

The product is aimed at developers building fraud and abuse prevention into web and mobile applications, with documented use cases including account takeover, account sharing, ban enforcement, card testing, chargeback disputes, coupon abuse, credential stuffing, loan fraud, new account fraud, paywall enforcement, personalization, regional pricing enforcement, SMS pumping, survey fraud, and web scraping detection. Workspaces are region-specific (US, EU, or AP), and a free trial is available without a credit card.

Key features

• Generates a persistent visitor_id by fingerprinting browser/device attributes
• Smart Signals for bot detection, VPN detection, and browser tampering detection
• Server API, Webhooks, and Sealed Client Results for secure server-side access to identification data
• Client SDKs for JavaScript, React, Next.js, Vue, Angular, Svelte, iOS, Android, React Native, and Flutter
• Server SDKs for Node.js, PHP, C#/.NET, Go, Java, and Python
• Multi-region data hosting (US, EU, AP) configurable via the agent

Frequently asked questions