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Free security tool

Passwords: generate a strong one and test how strong yours is, in one place

Make a long random password or a passphrase, and see how long a password would take to guess. Free, no sign-up, nothing leaves your browser.

Free, no sign-up to use · what you type or add stays on your device · works offline · How it works

What do you want to do?
Type
Characters

Your password

••••••••••••••••

…

Entropy
—
Time to crack
—
Length
—

Made in your browser with a cryptographically secure generator. It is never sent or stored anywhere.

Passphrase words: EFF Large Wordlist, © Electronic Frontier Foundation, CC BY 3.0 US.

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About this tool

Two password questions come up again and again: give me a strong one, and is mine good enough. Here both tools live together. The generator uses your browser's cryptographic random numbers to make random-character passwords or passphrases of real words, with the length and characters you choose. The strength checker looks for the patterns an attacker tries first (common passwords, names, dates, keyboard runs), shows a five-step meter, the time to guess it in three attack scenarios and what to change. Choose what you want to do at the top. A password never moves between the tabs, is not saved and never goes into the address or to a server.

How to use it

  1. 1 Choose at the top: generate a password or test the strength of one.
  2. 2 To generate, pick random characters or a passphrase, the length and the characters, and copy the result.
  3. 3 To test, type or paste the password and read the meter, the time to guess it and the tips.
  4. 4 Switch tabs at any time; each keeps its own content while the page is open.

Frequently asked questions

Is the password sent or saved anywhere?

No. Generating and testing happen in your browser. The password is not sent to a server, not saved and not put in the page address or in a shared link.

Do the old pages still exist?

Yes. The password generator and the strength checker each keep their page, which opens this same page on its own tab.

Where is the hash generator?

With the developer tools: a hash is a fingerprint of a text or file, not a password.

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