Category: Calculators
Coin Flip
Flip one or many virtual coins with true random heads or tails
Flip one coin for a quick decision or many at once to see the split between heads and tails. Runs entirely in your browser with no server round trip.
Flips use the Web Crypto API, not Math.random, and nothing is sent anywhere.
Everything on this page is processed in your browser. Nothing is uploaded.
What this tool does
Each flip draws its randomness from the Web Crypto API's crypto.getRandomValues, the same cryptographic source the password generator uses, so the outcome is not predictable from previous flips. Flipping several coins at once shows every individual result in order along with the running heads and tails counts, useful for checking how close a small sample lands to fifty-fifty.
How to use it
- Set how many coins to flip at once.
- Press Flip to see each coin's result.
- Check the heads and tails counts below the results.
Privacy
This tool runs entirely in your browser. Your input is never uploaded, stored or shared — closing the tab removes it.
Frequently asked questions
- Is this a true 50/50 random flip?
- Each flip is drawn independently from the Web Crypto API's crypto.getRandomValues, so over many flips the split converges on 50/50 the same way a fair physical coin would.
- How many coins can I flip at once?
- Up to 100 coins in a single flip, with a running heads and tails count shown underneath.
- Are my flips saved anywhere?
- No. Results exist only in the page and are gone as soon as you leave or reload it.