Decision result
Click “Decide now” to get a result.
Show the decision result in a centered popup after each run.
Visual wheel
In wheel mode, the spinner rotates to the selected option.
Recent decisions
Algorithm details
Choose based on your scenario: Web Crypto uses OS-backed cryptographic randomness, HMAC-DRBG supports reproducible streams with a seed, and Xoshiro256** is optimized for high-speed simulation. Everything runs locally in your browser.
- • Web Crypto CSPRNG: backed by browser and operating system entropy sources, with rejection sampling to avoid modulo bias.
- • HMAC-DRBG (SHA-256): follows the NIST SP 800-90A style K/V state update model for deterministic pseudo-random streams.
- • Xoshiro256**: a fast and widely known PRNG, seeded via SplitMix64 for robust state initialization.
How to use
1. Enter your question and options (one per line). 2. Pick a decision mode: list draw, wheel spin, coin flip, or dice roll. 3. Choose the random algorithm and optionally set a seed for reproducibility. 4. In dice mode, set how many dice to roll together (1 to 10). 5. Click “Decide now”, then review and copy the result.
What can you decide with it?
- What should we eat tonight?
- Where should we go tomorrow?
- Should I confess tomorrow?
- Work/study this weekend or take a break?
- Which movie/episode should we watch?
- Workout today or take a rest day?
- Buy it now or wait?
- Which route or departure time should we choose?
- What gift should I pick?
- Which task should I start with?
