Generate cryptographically secure random passwords using the Web Crypto API (crypto.getRandomValues). Customize password length, character sets, and special symbols to meet any security requirement. This free online password generator runs entirely in your browser — no password is ever sent to a server, stored, or logged. NIST-compliant, works offline, and generates passwords with measurable entropy. Create unique passwords for every account and store them in a password manager.
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Frequently Asked Questions
How do I generate a strong password?
Use a password generator that creates random strings using a cryptographically secure random number generator (CSPRNG). A strong password in 2026 should be at least 16 characters long, include uppercase, lowercase, numbers, and symbols, and be unique for every account. Never use dictionary words, personal information, dates, or keyboard patterns (qwerty, 123456). This tool uses the Web Crypto API for true randomness.
Is it safe to use an online password generator?
It depends on the tool. This password generator runs 100% in your browser using crypto.getRandomValues() — no password is ever sent to a server, stored, or logged. The tool works fully offline. Avoid generators that submit passwords to backend APIs, as they could be logged or intercepted. Always verify a tool is client-side before trusting it with security-critical generation.
How long should a password be in 2026?
NIST SP 800-63B recommends a minimum of 8 characters, but security experts recommend 16+ characters in 2026. Each additional character exponentially increases brute-force difficulty. A 16-character password with mixed case, numbers, and symbols has approximately 1031 possible combinations — requiring billions of years to crack with current hardware. For critical accounts, use 20+ characters.
What is a passphrase and is it more secure?
A passphrase is a sequence of random words like "correct horse battery staple." Passphrases are easier to memorize than random character strings and can be very secure when using 4+ truly random words from a large wordlist. A 4-word passphrase from a 7,776-word dictionary (Diceware) has ~50 bits of entropy. For maximum security, use a random password stored in a password manager — you only need to remember one master password.
What is password entropy?
Entropy measures the randomness (unpredictability) of a password in bits. It's calculated as log2(charset_size^length). A password with 80+ bits of entropy is considered very strong. For example: a 20-character password using 94 printable ASCII characters has ~131 bits of entropy. Higher entropy = more possible combinations = harder to crack by brute force.