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knowu

v1.1.1

Published

Opensource browser fingerprinting

Vulnerabilities

Powered byPowered by Snyk
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  • 0Medium
  • 0Low

Links

Git

Maintainers

ransomwareransomware

Keywords

fingerprintingknowubrowseranalytics

Readme

knowu

Version License Logo

knowu is a comprehensive browser fingerprinting library with a simple async API. It collects a wide range of signals (canvas, WebGL info & extensions, fonts, screen, timezone, languages, plugins, audio fingerprint, hardware concurrency, device memory, CPU class, platform, color gamut, contrast, forced/inverted colors, monochrome depth, storage support, DOM blockers, PDF viewer enabled, architecture, Apple Pay, private click measurement, reduced motion/transparency, vendor info/flavors, math fingerprint, touch support, etc.) and provides an easy-to-use API for recording and sending fingerprints.

The library is built in pure JavaScript, bundled with Bun’s built‑in bundler, and is published for use via a CDN.

Currently there is no corresponding server/analysis platform for it. But it is in the making and I will anounce it soon.

Features

  • Comprehensive Fingerprinting: Gathers dozens of browser signals.
  • Simple async API: Easily record and send fingerprints asynchronously.
  • Browser Bundles: Provides both ESM and IIFE builds for modern and legacy browsers.
  • Lightweight & Fast: Bundled and minified for performance.
  • Zero-dependencies: No shims, no dependencies, no none-sense.

Installation

You can install via Bun (or npm if desired):

bun install knowu

Or, if you prefer to use the library via a CDN, once published you can reference the bundle via services like unpkg or jsDelivr.

Usage

The library exposes a global class Knowu. For example, include the UMD bundle in your HTML page:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <title>Knowu Example</title>
  <script src="https://unpkg.com/knowu/dist/knowu.umd.js"></script>
</head>
<body>
  <script>
    // Create an instance pointing to your backend endpoint
    const knowu = new Knowu("https://your-backend.example.com/fingerprint", { sendOnLoad: false });
    
    // Record a fingerprint and then send it
    knowu.record().then(fp => {
      console.log("Fingerprint:", fp);
      knowu.send(fp).then(response => {
        console.log("Fingerprint sent:", response);
      });
    });
  </script>
</body>
</html>

License

This project is licensed under the GPL-3 license.