ThinkVault ToolsCoin Flip

Fun & Decisions

Coin Flip

Each flip chooses heads or tails with equal probability. Earlier flips do not change the next flip.

One coin per flip; the last ten results stay until reset or reload.

Results

Share link

Choose your settings, then start.

For everyday choices and activities, not an audited prize draw. Repeated outcomes can occur; random does not mean evenly spread on every run.

Method and common questions

Inputs and results

Each flip chooses heads or tails with equal probability. Earlier flips do not change the next flip.

One coin per flip; the last ten results stay until reset or reload.

Storage and sharing

Names and results stay in the current page memory and clear on reload. Sharing includes only the tool link, never the list or results.

For everyday choices and activities, not an audited prize draw. Repeated outcomes can occur; random does not mean evenly spread on every run.

Method

Uses browser randomness with rejection sampling to avoid modulo bias. Lots refer to input rows. Groups use a shuffle followed by round-robin allocation. Each flip chooses heads or tails with equal probability. Earlier flips do not change the next flip.

Last checked: 2026-10-26

W3C Web Cryptography

FAQ

Is my list saved automatically?
Names and results stay in the current page memory and clear on reload. Sharing includes only the tool link, never the list or results.
Why can results repeat?
For everyday choices and activities, not an audited prize draw. Repeated outcomes can occur; random does not mean evenly spread on every run.
Tool options

Add to your home screen

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Scan the QR code on your phone, open the site and add it to your home screen.

Generating QR code…

https://hkdatalab.com/en

Desktop/Android: if no install button appears, use Install app or Add to Home Screen in your browser menu. Availability depends on the browser.

Some cached pages may reopen offline, but not all pages will work. New pages, updated rates and quotes need a connection.