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Coin Flip

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About

Coin Flip is a browser coin toss: hit Flip, a 3D coin spins, and it lands fairly on heads or tails. A running tally of your results is kept on this device. No account, no server.

How it works

The outcome is decided up front with Math.random() < 0.5, then the coin is rotated a handful of full turns plus a half-turn for tails — a pure CSS 3D transform with a transition does the spin. The result and tally are committed once the animation lands. The tally lives in localStorage under kaspirius:coin-flip:tally.

Metadata
title
Coin Flip
description
A browser coin flip — call heads or tails and watch a 3D coin spin to a fair, random result. Your heads/tails tally is kept in your browser.
canonical
https://kaspirius.com/coin-flip
updated
Last updated
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Structured data (JSON-LD)
TechArticle

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

{
  "@context": "https://schema.org",
  "@type": "TechArticle",
  "headline": "Coin Flip — game",
  "description": "A browser coin flip — call heads or tails and watch a 3D coin spin to a fair, random result. Your heads/tails tally is kept in your browser.",
  "url": "https://kaspirius.com/coin-flip",
  "mainEntityOfPage": {
    "@type": "WebPage",
    "@id": "https://kaspirius.com/coin-flip"
  },
  "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