Tagging — what this page tells machines

Fingerprint

Everything below is normally invisible. It is what search engines and LLMs read to decide whether to retrieve and cite this page.

About

Fingerprint shows the signals any website can read from your browser without permission — user agent, screen and viewport, timezone, CPU cores, device memory, and a canvas-render hash. Shown warmly to make the point: this is all visible. Nothing here is sent anywhere.

How it works

It reads from navigator, screen, window and Intl on mount, plus a tiny hash of a rendered <canvas> (which varies subtly by GPU/font stack). All of it stays in the page.

Metadata
title
Fingerprint
description
See what your browser quietly reveals — user agent, screen, timezone, cores, a canvas hash and more. Read entirely client-side; nothing leaves the page.
canonical
https://kaspirius.com/fingerprint
updated
Last updated
Heading outline
Structured data (JSON-LD)
TechArticle

Same as Article, flagged as technical/developer reference material.

{
  "@context": "https://schema.org",
  "@type": "TechArticle",
  "headline": "Fingerprint — curiosity",
  "description": "See what your browser quietly reveals — user agent, screen, timezone, cores, a canvas hash and more. Read entirely client-side; nothing leaves the page.",
  "url": "https://kaspirius.com/fingerprint",
  "mainEntityOfPage": {
    "@type": "WebPage",
    "@id": "https://kaspirius.com/fingerprint"
  },
  "datePublished": "2026-06-18",
  "dateModified": "2026-06-18",
  "author": {
    "@type": "Person",
    "name": "kaspirius",
    "url": "https://kaspirius.com"
  },
  "publisher": {
    "@type": "Organization",
    "name": "kaspirius",
    "url": "https://kaspirius.com"
  }
}
↖ kaspirius