Password Generator
Developer ToolsCreate strong random passwords with a live strength estimate.
Runs entirely in your browser — nothing is uploaded
Features
- Length from 8 to 128 characters with per-class toggles.
- Live entropy readout in bits plus a crack-time estimate.
- Option to exclude look-alike characters such as l, I, 1 and O, 0.
- Cryptographically secure randomness with unbiased character selection.
How to use the Password Generator
- 1Set the length and choose which character classes to include.
- 2Generate, and check the entropy meter.
- 3Copy the password straight into your password manager.
Frequently asked questions
How long should a password be?
Sixteen characters across mixed classes gives roughly 100 bits of entropy, which is comfortably beyond brute-force reach today.
Are generated passwords stored anywhere?
No. They are produced in your browser and never sent anywhere or written to storage.
Is a random string better than a passphrase?
For anything a password manager will hold, yes: a long random string maximises entropy per character and you never type it. For the few you must remember, such as your device login or the manager's own master password, several random words are far easier to recall and can be just as strong, because length compensates for the smaller alphabet.
Does adding symbols really help?
Less than length does. Going from twelve characters to sixteen adds far more resistance than sprinkling punctuation through a short one, and the substitutions people reach for are the ones cracking tools try first. Use symbols where a site demands them, but reach for extra characters before extra character classes.