Password Generator

Cryptographically random passwords with a strength meter

Runs locally No limits No signup 0 uses

Strength: — · about 0 bits of entropy

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Generated with crypto.getRandomValues() in your browser — never transmitted or logged. Length beats complexity: every character added multiplies the search space far faster than another symbol class does. For where to keep them, see password managers explained.

64-character password generator

Choose 64 for the longest password the generator makes. A password that long is not meant to be typed or remembered — it is for storing in a password manager, or for a secret that only ever gets pasted, such as an API key or a recovery passphrase in a vault.

For a password you will occasionally have to type, 16 or 20 characters is a more practical length. Some sites still cap password length well below 64 and will either reject a longer one or quietly cut it short, which can lock you out later, so check that the site accepted the full password by signing out and back in once.

Every password is generated in your browser using its cryptographic random number generator. Nothing is sent anywhere or stored.

About the Password Generator

Generate strong random passwords using the browser Web Crypto API. Choose length and character sets, see a live entropy estimate, and copy with one click.

Frequently asked questions

Not for a password manager, which is what that length is for. But some sites cap password length well below 64 and either reject a longer one or cut it short without saying so. After setting one, sign out and back in once to check the full password was accepted.

They come from the browser Web Crypto API, which is a cryptographically secure random source. They are generated locally and never transmitted or logged.

Sixteen characters is a sensible floor and twenty is better. Length adds far more strength than swapping letters for symbols.

Never. Reuse is what turns one site breach into a dozen compromised accounts. Use a password manager and generate a new one per site.

Yes, completely. There is no account, no usage limit and no watermark.