Coin Flip
Heads or tails, decided instantly.
A coin flip is a two-outcome uniform draw, which is exactly what random-number-1-2 does. This page adds the visual and the language people search for — heads, tails, flip.
For the question of whether a coin is fair, the interesting part is the sample size: twenty flips landing 13-7 is well within normal variance, and only a run of hundreds of flips reveals a biased coin.
How to use it
- Press flip.
- Read heads or tails.
- Set a count to flip a series and see the distribution.
What a 50/50 result actually looks like
People expect alternation and are surprised by streaks, but independence means streaks are guaranteed to appear. In 100 flips, a run of six identical results is more likely than not somewhere in the sequence.
The flip is decided by a single random bit, so there is no 1-in-6000 edge-landing possibility here. If the coin's fairness is what you are testing, the tool can only ever tell you about itself, not about physical coins.
Reviewed 2026-10-21. This tool runs entirely in your browser — no server, no account, and nothing you generate is stored.
Frequently asked questions
Is it exactly 50/50?
Yes. A single bit from the cryptographic random source, so there is no bias towards either side.
Can I flip multiple coins?
Yes, set the count. The series output shows each result and a heads/tails tally.
Can I use this to settle a bet?
As a shared reference point, yes — but both parties should agree to the method before the flip, otherwise the result is easy to dispute.
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