About Flip a Coin

Flip a Coin is a free virtual coin toss tool you can use online, no download required. It exists for one straightforward job: give you a fast, realistic, genuinely random heads-or-tails result whenever you need one, without an app to install, an account to create, or a physical coin to dig out of a drawer.

How the randomness works

Each flip result comes from crypto.getRandomValues(), the Web Crypto API built into your browser — the same category of random number generation used for cryptographic keys, not a basic pseudo-random function. The result is generated first, before the coin animation is even built, so the spin you see always lands on a result that was already locked in.

What we don't do

There's no sign-up, no account, and no data collection tied to your flips — see our Privacy Policy for the specifics. Your flip count and history are kept only in your browser for the current page visit and reset when you leave or refresh.

Other pages on this site

• Flip a coin — the main tool.
• Flip a coin — heads or tails — what each side means and how the call is made.
• Flip a coin multiple times — flip repeatedly and track results.
• Flip a coin for yes or no — a version framed around decision-making.
• Is a coin flip really 50/50? — the probability and fairness behind every flip.

Questions or feedback? Get in touch.