Virtual Coin Flip
コインのトスをシミュレート：表か裏か。
Frequently Asked Questions
Is the コイントス free to use?
Yes, the コイントス on Allio Tools is completely free with no sign-up or registration required. It works directly in your browser.
How does the コイントス work?
コインのトスをシミュレート：表か裏か。 No data is sent to a server — everything runs locally in your browser for maximum privacy and speed.
Do I need to install anything to use the コイントス?
No installation needed. The コイントス runs entirely in your web browser on any device — desktop, tablet, or mobile.
Is my data safe when using the コイントス?
Completely safe. The コイントス processes everything locally in your browser. No input data, results, or usage information is ever transmitted to or stored on any server.
Does the コイントス work offline?
After the page loads for the first time, the コイントス works without an internet connection for all client-side processing. Tools that fetch live external data (such as DNS or WHOIS lookups) require an active connection.
Are the results from the コイントス truly random?
Yes. The コイントス uses your browser's built-in cryptographically seeded random number generator, which provides high-quality unpredictable randomness suitable for games and fair decisions.