Password Strength Meter & Generator
Check how strong your password is, or generate a secure one instantly
Your password is never sent anywhere — all checks happen in your browser.
This tool checks password strength and generates cryptographically random passwords entirely in your browser — nothing is ever sent to a server, logged, or stored. The strength checker evaluates length, character variety, and common weak patterns to give you actionable feedback.
The generator uses crypto.getRandomValues, the same source of randomness used by security software, so generated passwords are genuinely unpredictable. Close the tab and they're gone — no history, no cloud sync, no account needed.
How to Use
- 1Use the Check Strength tab to paste any password and instantly see how strong it is, with specific tips to improve it.
- 2Use the Generate tab to create a strong random password — adjust the length and character types using the controls.
- 3Click Copy to Clipboard to copy your generated password and paste it into your account signup or password manager.
Frequently Asked Questions
- Is my password sent anywhere?
- Absolutely not — all strength checking and generation happens entirely in your browser. Your password never leaves your device.
- Why does it use crypto.getRandomValues instead of standard randomness?
- For genuinely unpredictable passwords. Standard random number generators can be predicted — cryptographic randomness cannot.
- How long should my password be?
- At least 16 characters for important accounts. Our generator defaults to 16 and supports up to 32.
- What makes a password strong?
- Length matters most, followed by a mix of uppercase, lowercase, numbers, and special characters — and avoiding common words or patterns.