Secure Diceware Passphrase & Password Generator

Instantiate cryptographically unbreakable hashes and memorable human passphrases utilizing true OS-level entropy boundaries offline.

Hardware-Accelerated Entropy

~100 bits of entropy

Security Heuristics

●Diceware Passphrases (like `correct-horse-battery-staple`) are cryptographically strong while remaining memorable for human typing compared to randomized jumbles.
●High Entropy Limit: Generating a 64+ length random string provides post-quantum resistance, ideal for API Secret Tokens and Encryption Keys.
●100% Offline: Sequences are calculated directly inside your RAM via `window.crypto` OS hardware interrupts. They are never logged or transmitted over the network.

What is the Password & Passphrase Generator?

Generate either a random-character password or a Diceware-style word passphrase, with control over length, word count, and which character types are allowed.

How it works

Both modes pull randomness from the browser's Web Crypto API (`crypto.getRandomValues`) rather than `Math.random`, using it to pick indices into a character set or into a 7,776-word Diceware list — each word contributes about 12.9 bits of entropy, so a 6-word passphrase lands around 77 bits.

SysAdmin & security use cases

Generating a memorable Diceware passphrase to protect a password manager's master password.
Creating a long random string for an API secret or encryption key where memorability doesn't matter.
Producing a Wi-Fi pre-shared key without visually ambiguous characters like O/0 or l/1.
Rotating the credentials on a shared admin account with a fresh random value.