About diceware passphrases
A diceware-style passphrase is a password made of several random words. Such passphrases are long and high-entropy, yet far easier to remember than random characters. This tool picks words at random using your device secure random source, lets you set the word count and separator, and shows the estimated strength. It runs in your browser.
How Diceware works
How to generate a passphrase
- Choose how many words you want (more words = stronger).
- Pick a separator and whether to capitalise or add a number.
- Generate, check the entropy, and copy your passphrase.
Why word passphrases are strong
Each random word adds entropy, so a five or six word passphrase is extremely hard to guess by brute force — while still being memorable. The estimated bits of entropy show roughly how strong it is.
Generated securely
Words are chosen with your browser cryptographic random generator (crypto.getRandomValues), and nothing is sent anywhere — the passphrase never leaves your device.
Common uses
- Create a strong, memorable password
- Generate a master password
- Make Wi-Fi or device passphrases
- Produce account passwords you can recall
- Replace weak passwords
- Generate several passphrases quickly
- Teach good password habits
- Get a secure, private passphrase
Frequently asked questions
What is a diceware passphrase?
A password made of several random words, which is both strong and easy to remember.
How many words should I use?
Five or six words gives strong security while staying memorable.
Is it secure?
Yes — words are chosen with your browser cryptographic random source, and nothing is uploaded.
Why are word passphrases easier to remember?
Words are memorable, yet several random ones together are very hard to guess.
Can I add numbers or capitals?
Yes — toggle capitalisation and an optional number.
What does entropy mean?
A measure of how hard the passphrase is to guess; higher bits are stronger.
Are my passphrases stored?
No — they are generated locally and never saved or sent anywhere.
Is it free?
Yes — completely free with no sign-up.