# Password & passphrase generator — strong & private, no upload

> Free password generator: create strong random passwords or memorable diceware passphrases with your browser's crypto RNG. Tune length and character sets, see live entropy.

Create strong random passwords or memorable diceware passphrases using your browser's cryptographic random generator. Tune length, character sets, and word count, watch a live strength and entropy estimate, and copy — no value is ever produced on or sent to a server.

The best password is one you never see again because a manager stores it — which means it should be as random as possible. This generator uses the browser's secure RNG so each result is unpredictable, and it shows entropy so you're choosing strength by evidence rather than superstition.

Diceware passphrases are the exception worth knowing: a handful of random words is genuinely strong and far easier to type on a phone or read aloud than a symbol soup, which is why they're ideal for master passwords.

Save what you create straight into a KeePass vault with the Vault Manager, sanity-check it with the Security Vault's Password strength checker, and audit your whole file with the Vault Health Check.

## How to

1. **Pick a type.** Choose a random password or a diceware passphrase.
2. **Set the rules.** Adjust length, character sets, or word count and separators.
3. **Check entropy.** Read the live strength/entropy estimate as you tune.
4. **Copy or save.** Copy the result, or drop it straight into a vault entry.

## FAQ

### Are these passwords truly random?

Yes. They're drawn from the browser's crypto.getRandomValues, a cryptographically secure source — not the predictable Math.random — so the output isn't guessable from prior values.

### Should I use a password or a passphrase?

Passphrases (several random words) are easier to type and remember while still having high entropy; random character strings are best where a manager fills them in and length is capped.

### How long should a password be?

Aim for a comfortable margin of entropy — the live estimate guides you. In practice 16+ random characters or 5–6 diceware words is strong for almost anything.

### Is anything sent to a server?

No. Generation and the strength estimate all run in this tab, so the secrets you create exist only on your device until you save them.


## Related tools

- [Vault Manager](https://www.safepaper.app/passwords/password-manager)
- [Vault Health Check](https://www.safepaper.app/passwords/password-audit)
- [Password strength](https://www.safepaper.app/security/password-strength)
- [Password hasher](https://www.safepaper.app/security/password-hash)

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Canonical HTML: https://www.safepaper.app/passwords/password-generator
Markdown: https://www.safepaper.app/passwords/password-generator.md

There is no upload endpoint — your files are processed in this browser tab. Open your network tab and check.