Secure Passphrase Generator
Secure Passphrase Generator handles one task — generate a four-word local passphrase — without an account or a download. Values come from the browser's built-in cryptographic random generator (Web Crypto), not a predictable pseudo-random function. It is used most by developers creating keys and tokens for a new service. Nothing is remembered, so copy the value before leaving the page. Nothing is gated: no signup wall, no trial period, no upgrade prompt.
Key features
- Nothing is remembered, so copy the value before leaving the page.
- Character sets and length are adjustable to meet a specific policy.
- Works on desktop, tablet and phone — no separate app to install.
- Loads in under a second and gives its result in one action.
How to use Secure Passphrase Generator
- 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
- Is the output from Secure Passphrase Generator genuinely random? — Yes. Secure Passphrase Generator uses the browser's Web Crypto generator, which is designed for cryptographic use — not the predictable Math.random.
- 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.
- Can I recover a value I lost? — No, and deliberately so: nothing is retained. Copy it into your password manager before leaving.