Coin flip

Yes. This tool uses crypto.getRandomValues(), the browser's cryptographically secure random number generator — the same API used for TLS session keys. Each flip is a completely independent 50/50 event, with no bias toward heads or tails.

Each flip has exactly a 50% chance of landing heads and a 50% chance of landing tails. These are independent events — the previous result never influences the next one. Even after ten heads in a row, the next flip is still 50/50.

Yes. Set the "Flips" input to any number from 1 to 100. In multi-flip mode, all results appear as labelled chips immediately and the stats update in bulk — useful for probability experiments or classroom demonstrations.

The gambler's fallacy is the mistaken belief that a random event is more or less likely to occur because of previous outcomes. Thinking that tails is "due" after several heads in a row is the classic example. In reality, each flip is independent and past results have zero influence on the next.

Assign heads to one option and tails to the other before you flip. Accept the result. Interestingly, if you feel relieved or disappointed by the outcome, that reaction often reveals what you actually wanted — making the coin flip useful beyond just the result itself.

Yes. The tool runs entirely in the browser with no server involvement, so no one controls the result. Use it to decide who goes first in a board game, settle a friendly debate, or run a sports coin-toss equivalent.