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Yes/No Decision

A fast, private coin-flip style decision helper. Use a fair 50/50 split or set a custom bias, choose single, best-of-N, or batch runs, and optionally fix a seed for reproducible outcomes.

Yes/No Decision
Client-side onlyFast & private
Labels
Probability & mode
50%
Randomness

Deterministic outcomes for a given seed

Notes

Uses a cryptographically secure RNG when unseeded. Seeding switches to a deterministic PRNG so that the same inputs produce identical results.

Result

50.0% Yes • Single
Outcome
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History (last 10)

No runs yet.

How to Use the Yes/No Decision Helper

This free, client-side Yes/No tool makes a fair decision using a secure random generator. You can set custom labels, choose Single, Best of N, or Batch mode, add a probability bias, and optionally provide a seed so results can be reproduced later. Nothing is uploaded.

  1. Labels: Keep “Yes/No” or rename them (e.g., “Go/Stay”, “Option A/Option B”).
  2. Probability: Leave at 50% for a fair flip, or slide to bias towards “Yes”.
  3. Mode: Use Single for one decision, Best of N (odd N) to avoid one-off luck, or Batch to see counts across N trials.
  4. Seed (optional): Turn on Use seed and enter a string (e.g., a project name) to ensure the exact same inputs produce the exact same output—useful for audits and demos.
  5. Run & review: Click Flip. Copy the summary or check the last 10 results in History.

Fairness & Math

  • Unseeded: Uses crypto.getRandomValues (CSPRNG) for unbiased draws.
  • Seeded: Uses a deterministic PRNG so the same seed and settings always match.
  • Best of N: Runs N independent flips and returns the majority winner (N coerced to odd).
  • Batch: Runs N flips and returns counts for each label.

Tips

  • Use Best of N when the stakes are higher; choose N=3 or 5.
  • Rename labels to match your decision (“Ship/Wait”, “Hire/Pass”).
  • Record a seed in meeting notes to make decisions reproducible.