Strong Password Generator
Generate strong, secure, random passwords with custom rules.
How to use this tool & FAQs
Click any question below to expand its guide and answer
How secure passwords are created
This password generator relies on the browser's native crypto.getRandomValues() API rather than pseudo-random math functions. Random bytes are uniformly mapped across your chosen character sets using rejection sampling to eliminate modulo bias, ensuring every character has an equal probability of appearing.
Understanding password entropy
Entropy measures the unpredictable information density of a password in bits ($L \times \log_2(R)$). A 16-character password chosen from a pool of 90 alphanumeric and symbol characters delivers over 95 bits of entropy, which would require billions of years for modern brute-force hardware to guess.
Privacy guarantee
Passwords are created exclusively in your computer's local memory. No passwords, lengths, or generation settings are ever transmitted over the network or saved to cookies or disk. When you close this tab or navigate away, memory buffers are immediately cleared.