@fingerprintjs/fingerprintjs-pro

Makes a website visitor identifier from a browser fingerprint. Unlike cookies and local storage, fingerprint stays the same in incognito/private mode and even when browser data is purged. Provides additional information and higher accuracy compared to Open Source FingerprintJS.

Quick start

Get a pro key:

• Register a new PRO account at dashboard.fingerprint.com/signup (there is a free trial)
• After registration go to the dashboard and select the created subscription
• Go the "API Keys" page in the navigation side bar on the left side of the page
• Copy a key with type "Public"

Install from NPM

npm i @fingerprintjs/fingerprintjs-pro
# or
yarn add @fingerprintjs/fingerprintjs-pro

import FingerprintJS from '@fingerprintjs/fingerprintjs-pro'

// Initialize an agent at application startup.
const fpPromise = FingerprintJS.load({ apiKey: 'your-pro-key' })

;(async () => {
  // Get the visitor identifier when you need it.
  const fp = await fpPromise
  const result = await fp.get()

  // This is the visitor identifier:
  const visitorId = result.visitorId
  console.log(visitorId)
})()

Run this code

Alternatively you can install from CDN

<script>
  // Initialize the agent at application startup.
  const fpPromise = import('https://fpjscdn.net/v3/your-pro-key')
    .then(FingerprintJS => FingerprintJS.load())

  // Get the visitor identifier when you need it.
  fpPromise
    .then(fp => fp.get())
    .then(result => {
      // This is the visitor identifier:
      const visitorId = result.visitorId
      console.log(visitorId)
    })
</script>

Note that you need to replace your-pro-key with a public API key from the dashboard.

Run this code

See also

🍿 Live demo

⏱ How to upgrade from Open Source to Pro in 30 seconds

⬆️ How to migrate from Fingerprint version 2

📕 Fingerprint documentation

▶️ Video: use Fingerprint to prevent multiple signups

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clientjs

ClientJS is a JavaScript library for browser fingerprinting and device detection. It provides basic functionalities for identifying users but lacks the advanced features and accuracy of @fingerprintjs/fingerprintjs-pro.

fingerprintjs2

FingerprintJS2 is an open-source browser fingerprinting library that generates a unique identifier for a browser. While it offers good basic fingerprinting capabilities, it does not provide the advanced features like bot detection and incognito mode detection available in @fingerprintjs/fingerprintjs-pro.

ua-parser-js

UA-Parser-JS is a JavaScript library to detect Browser, Engine, OS, CPU, and Device type/model from User-Agent data. It is more focused on parsing user-agent strings rather than comprehensive fingerprinting and lacks the advanced identification features of @fingerprintjs/fingerprintjs-pro.