Coin Flip
Flip a virtual coin or roll dice. Cryptographically fair randomness, runs in your browser, history tracked per session.
Coin Flip — A virtual coin flip and dice roller that uses the browser's cryptographically-secure random number generator. The result is unpredictable until the moment of the flip — no time-based trick, no pre-computed sequence. The session tracks how many heads vs tails you have seen, so you can verify the distribution over many flips.
Every flip and roll uses your browser's cryptographically-secure random number generator. Nothing is sent to a server.
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What is coin flip?
A virtual coin flip and dice roller that uses the browser's cryptographically-secure random number generator. The result is unpredictable until the moment of the flip — no time-based trick, no pre-computed sequence. The session tracks how many heads vs tails you have seen, so you can verify the distribution over many flips.
For coin flips, the answer is heads or tails with equal probability. For dice, the supported types are d4, d6, d8, d10, d12, d20, and d100. You can roll multiple dice at once and the tool shows each individual result plus the total.
How to use it
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Click "Flip the coin"
The coin rotates for a moment, then lands on heads or tails with equal probability.
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Pick dice type and count
Choose the number of dice and the number of sides (d4, d6, d8, d10, d12, d20, d100).
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Roll and read the result
Each die shows its face. The total appears next to the individual rolls.
Examples
Quick decision
Heads we eat out, tails we cook at home.
Result: Heads — you eat out tonight.
Tabletop RPG attack roll
Roll 1d20 + 5 to hit.
Result: Roll the d20, add 5. 18+ hits most AC values.
Multiple dice
Roll 3d6 for a D&D ability score.
Result: Sum the three results. The total is between 3 and 18, with an average of 10.5.
Frequently asked questions
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Last reviewed: 2026-08-19