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Kordu Tools
Fun & Random Runs in browser Updated 01 Apr 2026

Coin Flip

Flip a virtual coin online. Fair 50/50 heads or tails with animation, flip history, and statistics tracker.

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Heads

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Tails

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streak

Last 0 flips
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How to use Coin Flip

  1. Click the coin or Flip button

    Hit the Flip button or click the coin itself to start. The coin animates and lands on heads or tails.

  2. Read the result

    The result (Heads or Tails) is displayed prominently below the coin with the total session count.

  3. Flip multiple coins at once

    Use the ×2, ×5, or ×10 buttons to bulk-flip and see all results simultaneously.

  4. Check history and stats

    Your last 20 flips appear in the history row. The stats bar shows total heads, total tails, and your current streak.

Coin Flip FAQ

Is the coin flip truly random?
Yes. Each flip uses JavaScript's Math.random(), which is seeded from OS-level cryptographic entropy. Each flip is an independent 50/50 event — there is no pattern, memory, or bias between flips.

Does the coin have exactly a 50/50 chance?
Exactly 50/50. The algorithm returns heads for any random value below 0.5 and tails for anything at or above 0.5. Over a large number of flips, results converge to equal probability.

Is my flip history saved?
History and stats are stored only in browser memory for the current session. They reset when you close or refresh the tab — nothing is stored on disk or sent to a server.

Can I flip multiple coins at once?
Yes — use the ×2, ×5, or ×10 buttons below the main flip button to simulate multiple independent coin tosses in a single click.

What is the streak counter?
The streak counter shows how many consecutive flips have landed on the same side. It resets to 1 whenever the result changes.

Can I use this for a coin toss at the start of a game?
Yes. It is perfectly fair for any application where a physical coin toss would be used — sports, games, classroom activities, or any binary decision where each party should have an equal chance.

Does it work on mobile?
Yes. The coin flip is fully responsive and works on any modern smartphone or tablet browser. No app download required.

Is there a way to track long-run probability?
The cumulative totals (total heads and total tails) let you observe how the ratio converges toward 50/50 over many flips — useful for classroom probability demonstrations.

Background

No coin in your pocket? This free virtual coin flipper gives you an instant, provably fair heads or tails result in seconds. The animation makes the result satisfying rather than just a text output — useful for quick decisions, classroom activities, game night choices, and probability experiments.

Each flip uses JavaScript's Math.random() seeded from your browser's cryptographic entropy source — a true 50/50 probability with no patterns or bias. Heads lands for any value below 0.5; tails for anything at or above 0.5.

Bulk flip buttons (×2, ×5, ×10) let you flip multiple coins simultaneously — handy for probability demonstrations or when you need multiple independent coin tosses at once. The session history tracks your last 20 flips, cumulative totals, and current winning streak. All state resets when you close the tab.

Who is this for? Teachers demonstrating probability, game players making quick decisions, sports teams doing coin-toss calls, anyone who needs a fair random binary choice without hunting for a physical coin.

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