Password Generator — Free Online Generator
Generate secure random passwords with customizable options
All processing happens locally. No data is sent to any server.
Ej5LBFQcSAdynZtYStrength: strong · 95 bits of entropy
A strong password is the first line of defense for your online accounts. Our Password Generator creates cryptographically secure random passwords using the Web Crypto API — the same random number generator used by browsers for TLS certificates and security tokens. Choose your password length (4 to 128 characters) and toggle character sets: uppercase letters, lowercase letters, digits, and symbols. The generator uses `crypto.getRandomValues` for true randomness, not predictable pseudo-random sequences. Each generated password comes with an entropy estimate and strength rating (weak, fair, good, strong) so you know exactly how secure it is. The strength meter calculates entropy based on the password length and the size of the character pool. A 16-character password with all four character sets enabled produces roughly 95 bits of entropy — well beyond what brute-force attacks can crack in any reasonable time. Shorter passwords or those using fewer character types will have lower entropy and receive correspondingly lower strength ratings. All generation happens in your browser. No passwords are ever transmitted, stored, or logged. This makes the tool safe for generating passwords for any account, even production systems and root credentials. For related security tools, try our [Hash Generator](/tools/hash-generator) to create checksums, or [UUID Generator](/tools/uuid-generator) for unique identifiers.
FAQ
How secure are the generated passwords?
Very secure. We use the Web Crypto API (crypto.getRandomValues) which provides cryptographically strong random numbers — the same source used for TLS certificates and security tokens in browsers.
What does entropy mean?
Entropy measures password strength in bits. Higher entropy means more possible combinations, making brute-force attacks harder. 60+ bits is considered good; 80+ bits is strong.
Should I use symbols?
Symbols increase the character pool size, which raises entropy. However, some systems don't support all symbols. Toggle symbols based on what your target system allows.
Are passwords stored anywhere?
No. All generation happens in your browser using the Web Crypto API. Nothing is transmitted to any server.