CreepJS

CreepJS

Educational, privacy-first browser fingerprinting platform for developers.

Product

  • Checker
  • Documentation
  • IP Risk Checker
  • API Playground

Resources

  • CreepJS 2.0
  • API Reference
  • Browser Fingerprinting Guide
  • Fingerprint Signal Index
  • Privacy Policy

Popular Signals

  • Canvas Fingerprint
  • WebGL Fingerprint
  • WebRTC Fingerprint
  • Anti-Fingerprinting Detection

Connect

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Hardware

Hardware Concurrency

CPU core count

Live Playground

Analyzing your browser...0%

API Docs

Endpoint

GET /api/fingerprint/hardware-concurrency

Examples

About

Hardware concurrency fingerprinting detects the number of logical CPU cores via navigator.hardwareConcurrency. This reveals device performance tier: 2 cores indicate budget laptops or older devices, 4 cores represent mainstream consumer hardware, 8 cores suggest high-end consumer or entry-level workstation devices, 12-16 cores indicate professional workstations, and 24+ cores point to servers or high-end workstations. This value correlates strongly with device purchase price and user demographics. Professional users (developers, video editors, 3D artists) typically have higher core counts. Mobile devices report 6-8 cores (efficiency + performance cores on ARM). This metric is extremely stable unless hardware is upgraded.

Use Cases

  • •Device tier identification
  • •Performance profiling
  • •User demographics
  • •Professional vs consumer

Other Fingerprints

Compare related fingerprint signals

Move from this collector to the CreepJS signal index, live checker, API docs, and other high-value fingerprinting explainers.

Core pages

Browser Fingerprinting PlatformRun a privacy-first browser fingerprint check and learn what websites can infer about your device.Fingerprint CheckerTest your browser privacy with a live fingerprint scan, collector coverage, and privacy leakage analysis.IP Risk CheckerCheck IP risk, ASN, geolocation, proxy, VPN, Tor, datacenter, and routing signals through the CreepJS API.Browser Fingerprint SignalsBrowse the full CreepJS library of browser fingerprinting signals, including canvas, WebGL, WebRTC, fonts, storage, and privacy checks.DocumentationRead the CreepJS API, SDK, collector, and integration documentation for privacy-first browser fingerprinting.API PlaygroundGenerate a token, inspect sample payloads, and test CreepJS browser fingerprinting API calls.What Is Browser Fingerprinting?Learn how browser fingerprinting works, which signals are collected, and how privacy tools reduce tracking.

Popular fingerprint signals

Canvas FingerprintCanvas rendering fingerprint based on how the browser draws graphics. Test your browser's unique canvas signature.WebGL FingerprintWebGL GPU information and rendering capabilities. Detect your graphics card and WebGL implementation.WebRTC FingerprintWebRTC capabilities and IP leakage checks. Detect peer connection support and potential network exposure signals.Anti-Fingerprinting DetectionDetection of privacy tools and browser modifications. Identify fingerprint resistance.Navigator InformationBrowser navigator properties and user agent information. Analyze browser capabilities and settings.Font DetectionInstalled system fonts detection. Discover which fonts are available on your system.