Coin Flip
Flips a fair virtual coin — one at a time with an animation, or up to 10,000 at once — and tracks the running tally, percentages and the longest streak of heads or tails.
Runs 100% in your browser — nothing you generate leaves your device.
Read the full guide to this tool
Notes
- Each flip is an independent 50/50 draw from the crypto random source; past flips never influence the next one.
- Long streaks are normal, not a sign of bias: in 100 flips there is about a 97% chance of a streak of 5 or longer.
- Everything runs locally in your browser; nothing you enter or generate is sent to any server.
Explore the idea
Related tools
Are You Random? — The Oracle
Press left or right at random. The machine predicts your next press — and wins.
Dice Probability Lab
Exact odds for any dice expression — 4d6kh3, 2d20kh1…
Dice Roller (RPG Notation)
Roll 3d6+2, d20, 4d6 keep highest 3 — with statistics.
Wheel Spinner
Spin a colorful wheel to pick from your own entries.
Passphrase Generator (Diceware)
Random word passphrases off the EFF diceware list.
Password Generator
Strong random passwords with the entropy shown in bits.