The fastest strong password generator — create a secure random password
with custom length, symbols and character types instantly.
Our client-side password generator uses the Web Crypto API.
No storage, no server, 100% private.
Random Passwords · Strength Tester · Bulk Generation · No Storage · Free
Set length, select character types and optionally exclude ambiguous characters.
The Web Crypto API (getRandomValues) generates cryptographically secure random bytes.
The strength meter calculates entropy in bits and estimates crack time based on brute force.
Copy individual passwords or download a bulk list. Nothing is ever stored or sent anywhere.
A strong password generator creates random, unpredictable passwords by drawing from a large character set using a cryptographically secure random number generator — not a simple pseudo-random algorithm. This tool uses window.crypto.getRandomValues(), the same entropy source used by banking software and password managers, to ensure every password is genuinely random and impossible to predict.
Our online password maker is a true client-side password generator no storage solution. Passwords are generated entirely in your browser — no password is ever transmitted to a server, logged, stored in a cookie or accessible to any third party. The page also works offline once loaded.
| Character Type | Characters | Set Size | Entropy Added per Char |
|---|---|---|---|
| Uppercase | A–Z | 26 | +4.70 bits |
| Lowercase | a–z | 26 | +4.70 bits |
| Numbers | 0–9 | 10 | +3.32 bits |
| Symbols | !@#$%^&*()_+-=[]{}|;:,./ | 28 | +4.81 bits |
| All four combined | — | 90 | +6.49 bits |
A 16-character password using all four character sets (pool of 90) has ~103 bits of entropy — far beyond the 80-bit minimum recommended by NIST for high-value accounts. For comparison, a simple 8-digit PIN has only 26 bits of entropy.
Here's a practical guide to generate secure password online free with the right settings for different security levels:
For most accounts — email, social media, shopping — enable all four character types (uppercase, lowercase, numbers and symbols) and use at least 16 characters. Click the 16-char Strong preset for a one-click setup. The strength meter will show Strong or Very Strong for this configuration.
A 12-character password with all character types is acceptable for lower-risk accounts and sites with their own additional protections (2FA, rate limiting). Use the 12-char Standard preset. Adding symbols gives ~78 bits of entropy — well above the brute-force threshold for current hardware.
Enable Exclude ambiguous to remove characters that are easily confused when reading or typing: l (lowercase L), I (uppercase i), O (letter) and 0 (zero). This is useful when you need to type a password manually rather than paste it.
To generate unique passwords for every account, set Quantity to the number of accounts you want to cover (up to 100) and click Generate. Download the full list as a text file, then store it in a password manager like Bitwarden, 1Password or KeePass — never reuse the same password across multiple sites.
This secure random string generator helps users across all security levels:
window.crypto.getRandomValues(), the browser's cryptographically secure random API. No password is ever sent to any server, logged, stored in a cookie or accessible to anyone else. It also works offline.l (lowercase L), I (uppercase i), O (letter O) and 0 (zero). This is useful when you need to type a password manually rather than paste it from a password manager.window.crypto.getRandomValues() — the same CSPRNG used by TLS, SSH key generation and browser-based encryption. Standard JavaScript Math.random() is NOT cryptographically secure and should never be used for security-sensitive passwords.