How it works

How to flip a coin online without overthinking it.

Pick a call, press the flip button, and read the receipt. The tool uses browser-side randomness and keeps the log only in your current tab.

Call before the flip

The cleanest habit is to say “heads means yes” or “tails means option B” before flipping. This prevents the coin from becoming a negotiation after the fact.

Randomness model

When available, the tool uses crypto.getRandomValues. If a browser blocks that API, it falls back to standard browser randomness and labels the session honestly in the code path. This is suitable for casual choices, not gambling or regulated decisions.

Batch flips

Batch flips are useful for checking a quick sequence, but they should not be used to justify an important statistical claim. For a simple decision, one flip is enough.

Open the coin flipper or browse coin flip examples.