Coin flip
Heads or tails, settled fairly. Flip a coin with a quick spin, use your own labels, or run ten or a hundred flips at once, all in your browser.
Files are processed in your browser and never uploaded.
How to use Coin flip
Set the options
Choose Side 1 and Side 2. Nothing is hidden until you press a button.
Press Flip the coin, Don →
The result is produced on your own device, using your browser's own random and crypto functions where randomness is involved.
Keep the result
Run it again for a different result. Nothing is stored or sent anywhere.
What this tool does
Fair fifty-fifty flips using secure randomness
The flip uses the browser's cryptographic random source rather than Math.random, so heads and tails really are fifty-fifty.
A quick coin-spin animation
The coin spins before it lands, which is there so a decision feels settled rather than just printed.
Use your own labels instead of heads and tails
Side 1 and Side 2 take your own words, so it can decide between two people, two restaurants or two options rather than heads and tails.
Flip ten or a hundred times at once with running totals
Flip x10 and Flip x100 run the whole batch at once and keep a running total, which is the quickest way to see the odds behave.
Runs in your browser, nothing saved or uploaded
Every flip happens in your browser. Nothing is uploaded and nothing is kept when you close the tab.
Frequently asked questions
Is the coin flip really fair?
Yes. Each flip uses your browser's secure random generator, the same kind used for cryptography, so heads and tails each have an exact fifty percent chance with no bias.
Is anything saved or uploaded?
No. The whole tool runs in your browser and nothing is sent anywhere. Your running count is kept only on screen and resets when you reload.
Can I use my own labels instead of heads and tails?
Yes. Change the two side labels to anything you like, such as Yes and No or two names, and the coin and the running totals update to match.
What are the multi-flip buttons for?
Flip x10 and x100 run that many flips instantly and add them to the totals, which is handy for quickly seeing how results even out over many tries.
Does the running count mean the next flip is due to change?
No. Each flip is independent, so a long run of heads does not make tails more likely next. The totals simply record what has happened so far.
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