Password Strength Tools
Check the strength of your passwords to ensure online security.
Password Strength Checker
At least 8 characters
Uppercase letter
Lowercase letter
Number
Special character
Password Generator
Entropy Calculator
Password Reverser
Pattern Analyzer
Password Shuffler
Understanding Password Security
A Password Strength Checker evaluates how secure a password is based on factors like length, complexity (mix of uppercase, lowercase, numbers, symbols), and uniqueness. Weak passwords are easy for attackers to guess or crack using various techniques, putting your online accounts at risk.
All analysis and generation happen directly in your browser — no data is stored or transmitted to any server, ensuring your passwords remain private.
Frequently asked questions
Absolutely not. All password processing, including strength checking, generation, and analysis, is done entirely within your web browser. Your passwords are never sent to our servers or stored anywhere.
A strong password includes at least 12–16 characters, with a mix of uppercase (A-Z), lowercase (a-z), numbers (0-9), and special symbols (!@#$%). It should avoid common words, personal information, and predictable sequences like "123456" or "qwerty".
The generator creates random strings of characters based on your selected criteria — length, uppercase, lowercase, numbers, and symbols — using Math.random() to ensure unpredictability.