Password Generator

Password Generator builds random passwords using the browser's cryptographic random number generator, the same source used for security-sensitive work in web applications. That matters, because the ordinary random function found in most scripts produces predictable sequences and should never be used for anything protecting an account.

You control the length and which character sets are included: lowercase, uppercase, digits and symbols. An option to exclude lookalike characters removes the pairs that cause trouble when a password has to be read aloud or typed from a screenshot, such as capital O and zero, or lowercase l and the digit one.

A strength estimate is shown as entropy in bits, which is a better guide than a coloured bar alone. Entropy measures how many guesses an attacker would need on average; adding length raises it faster than adding exotic characters. Nothing generated here is stored, logged or transmitted, and the password is gone as soon as you close the tab.

• Uses the browser's cryptographic randomness, never Math.random
• Adjustable length from 8 to 64 characters
• Lowercase, uppercase, digits and symbol sets
• Option to exclude lookalike characters
• Guarantees at least one character from every selected set
• Entropy shown in bits alongside a strength rating
• Generate several at once
• Nothing stored, logged or uploaded

The password generator is used by writers, developers, students, marketers and anyone else who needs the job done once without installing software. Common cases include:

• Creating a unique password for a new account
• Replacing a password that appeared in a breach
• Generating credentials for a test environment
• Producing an API key or token for internal use
• Making a password that can be read aloud without confusion