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✨ 100% Free · No Sign-Up · Works on Any Device

Randomness Audit

Don’t just trust us – run up to a million simulated spins and check the results with real statistics.

Randomness Audit screenshot

Overview

Transparent, Testable Randomness

Every Spinpik wheel, dice roll and team split uses your browser’s cryptographically secure random number generator. This page lets you test that generator yourself, live on your own device.

Choose how many entries are on the wheel and how many spins to simulate. The audit counts how often each entry wins, compares the counts to a perfectly even split and runs a chi-square test to tell you whether the differences are normal random variation.

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Step by step

How the Audit Works

1

Step 1

Pick the number of wheel entries (2–50).

2

Step 2

Choose 1,000, 10,000, 100,000 or 1,000,000 simulated spins.

3

Step 3

Press Run audit – the test runs instantly in your browser.

4

Step 4

Compare each bar to the dashed “expected” line and read the p-value verdict.

Features

What We Measure

Plain-English statistics anyone can understand.

Win Counts

How many times each entry was selected.

Expected Line

The count every entry would get in a perfectly even world.

Largest Deviation

The biggest gap from expected, as a percentage.

Chi-Square Test

The standard statistical test for fairness across categories.

p-Value

How likely the result is under true randomness.

Same Engine

The audit uses the exact random source our tools use.

Use cases

Why It Matters

  • Show giveaway participants that the draw is fair
  • Teach students how probability and sample size work
  • Verify randomness before using a wheel for class participation
  • Understand why short runs can look “streaky” even when fair
  • Build trust with viewers on streams and social media

FAQ

Frequently Asked Questions

The p-value is the chance of seeing differences at least this large if the generator is perfectly fair. Values above 0.05 are normal. A single low value can happen by chance; repeated low values would suggest bias.

Random results always vary. With more spins, the bars get closer to the expected line in percentage terms – that’s the law of large numbers.

No. The winner is chosen by the random generator before the animation starts. The spin simply shows that result.

We use rejection sampling: random values that would make some entries slightly more likely are discarded and redrawn, so every entry has exactly equal odds.

No. The simulation runs entirely in your browser.

Keep exploring

More Free Tools

Spin the Wheel

Create a custom wheel with names, numbers or prizes.

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Dice Roller

Roll d4 to d100 dice or flip a coin online.

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Random Team Generator

Split any list of names into fair, random teams.

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Convinced? Try the Real Thing

Spin a wheel with your own names, numbers or prizes.

Spin the Wheel