Strong Password Generator
Generate a strong, random password in one click. Choose your length and whether to include uppercase letters, numbers, and symbols. Click Calculate again any time for a fresh password — the longer and more varied it is, the harder it is to crack.
Formula reviewed for accuracy. Our methodology & sources
Password Generator
utility calculator
How It Works
The generator builds a character pool from the options you enable, then picks characters from it at random to reach your chosen length. It rates strength using entropy — the number of bits of randomness — which grows with both the password length and the size of the character pool. Confusing look-alike characters (like 0/O and 1/l) are left out so the password is easy to read and type without sacrificing security.
Formula
Entropy (bits) = Length × log2(pool size). More bits = harder to guess.
Examples
16-character password, all options on
A very strong password suitable for important accounts.
Frequently Asked Questions
What makes a password strong?
Length and variety. A long password (16+ characters) that mixes uppercase, lowercase, numbers, and symbols has high entropy, making brute-force attacks impractical. Length matters even more than complexity.
Is this password generator safe?
The password is generated on demand and is never sent anywhere or stored. For maximum safety, use a unique password for every account and store them in a password manager.
How long should my password be?
Use at least 12 characters; 16 or more is recommended for important accounts. Each extra character dramatically increases the time needed to crack it.
Should I use symbols?
Yes when the site allows them — symbols enlarge the character pool and raise entropy. If a site blocks symbols, compensate with extra length.
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