Coin Flip
Need to flip a virtual fair coin? Coin Flip does it in the browser, in a couple of clicks. Values come from the browser's built-in cryptographic random generator (Web Crypto), not a predictable pseudo-random function. It is used most by sysadmins issuing credentials that must meet a length policy. Character sets and length are adjustable to meet a specific policy. Free, unlimited, and free of the upsells most tools of this kind carry.
Key features
- Character sets and length are adjustable to meet a specific policy.
- Nothing is remembered, so copy the value before leaving the page.
- Works on desktop, tablet and phone — no separate app to install.
- Built to do one job properly rather than twenty jobs badly.
How to use Coin Flip
- Set your requirements: Choose the length and which character types to include.
- Generate: Press the button — a fresh cryptographically random value appears immediately.
- Store it safely: Copy it into a password manager now. Nothing is kept once you leave the page.
Frequently asked questions
- Can I recover a value I lost? — No, and deliberately so: nothing is retained. Copy it into your password manager before leaving.
- Can the same value be generated twice? — At the lengths used here the chance is vanishingly small — far below anything that matters in practice.
- Is this safe for production keys? — The randomness source is appropriate for it. Handle and store the value with the same care as any other secret.
- How long should a password be? — 16 characters or more with mixed character types is a sensible floor today; longer is better for anything valuable.