@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:

1. Register a new PRO account at dashboard.fingerprintjs.com/signup (there is a free trial)
2. After registration go to the dashboard and select the created subscription
3. Go the "Tokens" page in the navigation side bar on the left side of the page
4. Copy a token with type "Browser"

Install from CDN

<script>
  function initFingerprintJS() {
    FingerprintJS.load({ token: 'your-pro-key' }).then(fp => {
      // The FingerprintJS agent is ready.
      // Get a visitor identifier when you'd like to.
      fp.get().then(result => {
        // This is the visitor identifier:
        const visitorId = result.visitorId;
        console.log(visitorId);
      });
    });
  }
</script>
<script
  async
  src="//cdn.jsdelivr.net/npm/@fingerprintjs/fingerprintjs-pro@3/dist/fp.min.js"
  onload="initFingerprintJS()"
></script>

Alternatively you can install from NPM to use with Webpack/Rollup/Browserify

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

import FingerprintJS from '@fingerprintjs/fingerprintjs-pro';

(async () => {
  // We recommend to call `load` at application startup.
  const fp = await FingerprintJS.load({ token: 'your-pro-key' });

  // The FingerprintJS agent is ready.
  // Get a visitor identifier when you'd like to.
  const result = await fp.get();

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

🍿 Live demo

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

⬆️ How to migrate from FingerprintJS Pro version 2

📕 FingerprintJS Pro documentation

▶️ Video: use FingerprintJS Pro to prevent multiple signups