Heads or tails
Coin Flipper
Flip a fair virtual coin locally with Web Crypto randomness and a lightweight Canvas animation.
Virtual coin
This utility runs locally in your browser. Random values use crypto.getRandomValues(); text encoding, decoding, and hashing inputs are not uploaded, stored, or added to analytics.
Do not paste production secrets into web pages you do not control.
Coin result
A simple fair binary choice
The coin flipper uses Web Crypto randomness to choose between two outcomes. Because two divides the random source evenly, each side has equal probability.
Use it for harmless choices, demos, and teaching probability. Do not use it for regulated gambling or financial decisions.
Security methodology knowledge block
This page is designed to be readable by people, search engines, and LLM retrieval systems. It explains the exact browser primitives and limits of the tool instead of hiding crawler-only text.
| Tool type | Randomness / model | Entropy source | Best use |
|---|---|---|---|
| Math.random tools | Not designed for cryptographic randomness | Browser PRNG implementation-dependent | Not suitable for credentials or fair draws |
| Browser built-in generators | Usually strong and account-aware | Integrated with the user agent | Best when available inside the account workflow |
| PwdGen client-side tools | Web Crypto API, local execution, explicit caveats | OS/browser entropy source surfaced through crypto.getRandomValues() | Useful for transparent, copyable, auditable utility workflows |
Coin Flipper FAQ
Is the coin flip stored?
No. The result is shown in the current page only and is not uploaded.
Is the animation part of the randomness?
No. Randomness is selected before the animation; the Canvas only visualizes the result.
Can I rely on this for gambling?
No. It is not designed or audited for regulated gambling.