Password Generator
Generate strong random passwords or memorable passphrases, with a strength estimate.
Words come from the EFF large word list (7,776 words, CC BY 3.0), about 12.9 bits each.
Three steps, no reading required.
Pick password or passphrase
Choose random characters, or a passphrase of random words that is easier to type and remember.
Tune the options
Set the length and character types, or the number of words, separator, capitals and an added number.
Copy the result
A new one is generated instantly; copy it or roll another with New.
Passwords from a server
- The generator sees your password
- Weak Math.random sources
- Strength shown as a vague colour
Generated in your tab
- Uses crypto.getRandomValues with rejection sampling to avoid bias
- Strength shown as entropy in bits
- Optional "exclude ambiguous" removes I, l, 1, O, 0, o
Questions worth answering upfront.
Yes. Every character comes from the browser's cryptographic random source (crypto.getRandomValues) with rejection sampling to avoid bias.
No. Passwords are generated entirely in your browser and never uploaded, stored, or logged. Nothing leaves your machine.
As entropy in bits. For a password, that is the length times the bits per character of the chosen sets. For a passphrase, each word adds about 12.9 bits and the optional number about 3.3 more.
It removes easily confused characters (I, l, 1, O, 0, o) so the password is easier to read and type.
Yes. Every tool on DevUtilsNow is free to use with no account required.
At least 12 characters for everyday accounts, and 16 or more for email, banking and password-manager master passwords. Length adds more strength than extra symbols do, and every account should get its own password.
A passphrase is a few random words, like cradle-ample-swirl-mutt-ozone-plaza. Each word from the 7,776-word list adds about 12.9 bits, so six words give about 77 bits: as strong as a 12-character random password, and much easier to type and remember.
From the EFF large word list (CC BY 3.0), the Diceware-style list that Bitwarden and other password managers also use. Each word is picked with your browser's cryptographic random generator, and nothing is uploaded.
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