Password Generator
Generate strong random passwords. Customizable length, lowercase, uppercase, numbers, symbols.
How to Use
Enter your values in the fields above and click Calculate to get instant results. All computations run locally in your browser. No data is ever uploaded or stored.
Related Calculators
Secure Password Generation
CalcSolver's password generator creates cryptographically secure passwords using crypto.getRandomValues() — the browser's built-in CSPRNG (Cryptographically Secure Pseudo-Random Number Generator). This produces truly unpredictable passwords, unlike deterministic algorithms that can be reverse-engineered.
A 12-character password with uppercase, lowercase, digits, and symbols has over 6 trillion possible combinations — brute-force attacks would take centuries. Increasing to 16 characters pushes combinations beyond 10^28, making attacks effectively impossible with current technology.
Best practices: use at least 12 characters, include all character types, never reuse passwords across accounts, and store them in a reputable password manager (not in browsers or plain text files). CalcSolver generates passwords locally — nothing is transmitted to any server. See CalcSolver's random number generator for generating random numeric values.
Sponsored Content
The following content is provided by an ad partner and does not affect the calculator experience.
Frequently Asked Questions
What is a passphrase?
A passphrase is a sequence of random words used as a password, like "correct horse battery staple." Passphrases are easier to remember than random characters while being equally or more secure.
Are passphrases more secure than passwords?
A 4-word passphrase from a list of 2,000 words has about 44 bits of entropy, comparable to a 7-character random password. But passphrases are much easier to remember, reducing the temptation to reuse passwords.
How many words should a passphrase have?
For strong security, use at least 4-5 random words. Each additional word increases security exponentially. For critical accounts, 6+ words is recommended.