Decide
Flip a Coin
A real coin toss in your browser, run by its cryptographic random generator. Heads or tails, free, no signup.
Click the coin or press Space
Saved on this device only.
Weights detected. Alice x3 is 3 times as likely.Add x3 to an entry for 3 times the odds.
Every draw is logged with the time and the seed that produced it.
Nothing drawn yet. Spin the wheel and results will appear here.
Add entries to start tracking who gets picked.
Sorted least-picked first, so the people being missed are always at the top. Counts persist between visits.
The winner is locked in before the wheel moves. These three values let anyone confirm the result wasn’t changed afterwards.
SealedStep 1 · Before
Commitment
Not sealed yet
Show this to your audience before you spin.
Step 2 · After
Secret seed
Revealed once you spin
Proves the result was fixed in advance, not chosen after.
Step 3 · Check
Anyone can verify
Plain SHA-256, no account needed. Send the receipt to anyone who asks.
About this tool
How it works.
A coin flip you can audit. You see the odds before it moves, and every flip gets a receipt on the Receipt tab that anyone can recheck later. Nothing here is limited to two sides: add a third option and the winning label is struck onto whichever face lands up. The result stays on the coin until the next toss.
Everything is editable. Replace the list with your own, weight an entry by adding x3 after it, or switch draw modes above the entry box. Nothing is saved to a server, so your list stays in this browser.
What people use it for
- Settling who pays the bill
- Choosing sides before a game
- Making a 50/50 call fast
Tip
Rename the two faces to the actual choices instead of Heads and Tails, so the result reads as a decision rather than something you still have to translate.
Is it free?
Yes. This and all 52 other tools on the site are free with no account, no subscription, and no usage limit. You can use it in class, at work, in a giveaway, or on stream without asking permission.
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