What happens under the hood — and how to trust a draw.
When you use a wheel to pick a winner, it's fair to ask: is it actually random, or is it rigged? It's a good question, and the answer depends on how the tool generates its result. Here's a plain-English explanation of how Spin Wheel Free works and how you can judge any online spinner.
Spin Wheel Free chooses the winner using crypto.getRandomValues() — the browser's
cryptographically secure random number generator (CSPRNG). This is the same class of randomness
browsers use for security tasks like generating encryption keys. Every option has an equal chance, and the result
can't be predicted in advance.
Many simple tools use Math.random(), a basic pseudo-random function. It's fine for casual use, but
it's not designed to be unpredictable and can show subtle patterns. A CSPRNG is built specifically so that, even if
you know every previous result, you can't guess the next one. That's why we use it: the result is decided the moment
you spin, fairly, with no bias toward any slice.
If your wheel has four options, each has a 25% chance on every spin — independent of past spins. The wheel can
land on the same option twice in a row; that's normal randomness, not a glitch. If you want some options to
be more likely, you can weight them on purpose by adding *3 to a line or by listing an option more than
once. Without that, it's a level playing field.
Related: Run a fair giveaway · Full guide