Random tools

Coin Flipper

Flip one or more virtual coins privately in your browser.

Coin Flipper: TOEA uses your browser's crypto.getRandomValues API with unbiased rejection sampling. No inputs are uploaded. Runs 100% locally in your browser with zero server file uploads.

Category
Everyday tools
Runs
In your browser
Cost
Free · no sign-up
Availability
Ready to use
Coin Flip workbenchLocal processing

Runs entirely in your browser

Result

Waiting
Your result will appear here.

A virtual result is not a substitute for a physical coin where fairness must be independently observed.

What a fair run looks like

Flip 100 coins and you will rarely see exactly 50 heads. About 95% of the time the count lands between 40 and 60, and streaks are normal: in 100 flips a run of six or more identical results is more likely than not. A long streak is not a sign that the other side is due; each flip is independent of the last one.

Using a flip to decide

A coin settles a choice between two options only. For three or more, do not chain flips unevenly; put the options in the random list picker instead, which gives each an equal chance. Agree before flipping which side means what.

Studies of real coin tosses have found a slight tendency to land on the side that started face up. A virtual flip has no starting side, which suits disputes where neither party trusts the other's thumb.

How to use it

  1. Choose the options or enter one item per line.
  2. Generate a fresh result locally.
  3. Copy the result when you are ready.

Privacy & limitations

Inputs and results stay in your browser. This tool does not send list contents or generated values to a server.

Related tools

Dice RollerRandom NumbersYes or No Generator

Frequently asked questions

Is this cryptographically random?

The engine uses the browser's crypto.getRandomValues API, with rejection sampling for unbiased ranges. It is not a substitute for a reviewed security system.

Are my list items uploaded?

No. List tools process their input entirely in your browser.

Can I use results for passwords?

Use the dedicated password generator for passwords, and review its caveats for your situation.

Free tool · runs in your browser · no account required