Free Password Generator — Strong & Random
Generate strong, random passwords instantly. Pick your length, add symbols and numbers. Runs 100% in your browser — nothing is sent to any server.
Configure your options above, then click Generate.
How does this random password generator work?
This tool uses the browser's built-in crypto.getRandomValues() API to generate cryptographically random passwords. Unlike Math.random(), which is a predictable pseudo-random number generator, crypto.getRandomValues() is seeded from your operating system's entropy pool — making it suitable for security-sensitive applications.
No data ever leaves your device. The password is generated entirely in your browser, stored only in memory, and never sent to any server.
What makes a password strong?
- Length — every extra character multiplies the search space exponentially. Aim for 16+ characters for important accounts.
- Variety — mixing uppercase, lowercase, digits, and symbols forces attackers to check a far larger character set per position.
- Uniqueness — never reuse passwords. A breach at one service must never compromise your other accounts.
- Unpredictability — avoid dictionary words, names, dates, keyboard walks like
qwerty123, and substitutions likeP@ssw0rd.
How long should my password be?
Security experts recommend a minimum of 12 characters for most accounts. For high-value targets — email, banking, password manager master password — use 16–20 characters with all character types enabled.
To put it in perspective: a 16-character password with uppercase, lowercase, digits, and symbols has over 10²⁸ possible combinations. Even if an attacker could test one trillion passwords per second, cracking it would take longer than the age of the universe.
Should I use a password manager?
Yes. It's impractical to memorise dozens of long random passwords. Password managers such as Bitwarden (open-source, free tier) or 1Password store your passwords encrypted behind a single master password. Generate a unique password for every site using this tool, save it in your manager, and only remember one strong master password.
Frequently asked questions
Is this password generator safe to use?
Yes. The generator runs entirely in your browser using the Web Crypto API (crypto.getRandomValues). No passwords are transmitted, logged, or stored anywhere. Your password never leaves your device.
How does the random password generator work?
It uses your browser's built-in crypto.getRandomValues() — seeded from your operating system's entropy pool — to pick characters at random from your chosen character set. This is cryptographically secure, unlike Math.random() which is a predictable pseudo-random function.
How long should my password be?
Security experts recommend a minimum of 12 characters for most accounts. For high-value accounts like email, banking, or your password manager master password, use 16–20 characters with all character types enabled. A 16-character mixed password has over 10²⁸ combinations — infeasible to brute-force even with specialised hardware.
Can a strong password be hacked?
Technically yes, but practically no. A 12-character password using only numbers takes about 25 seconds to crack. A 12-character password with uppercase, lowercase, digits, and symbols takes an estimated 34,000 years. Length and variety are everything.
Why do some websites reject certain special characters?
Older systems sometimes have restrictions on which special characters they accept. If a site rejects your password, uncheck "Symbols" and regenerate. The resulting password is still strong as long as it is 12+ characters with upper, lower, and digits.
Should I use a password manager?
Yes. It is impossible to memorise dozens of unique long passwords. A password manager (such as Bitwarden, which is free and open-source) stores all your passwords encrypted behind one master password. Generate a unique password for every site and let your manager remember them.
What is the difference between a password and a passphrase?
A password is a random string of characters. A passphrase is a sequence of random words (e.g. "correct-horse-battery-staple"). Passphrases are easier to remember and can be equally or more secure if they are long enough — 4+ random words gives good entropy.
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