Frequently Asked Questions
What is a Password Strength Checker?
A password strength checker is an educational tool that analyzes a password and estimates how difficult it would be for a computer program to crack it. It looks at length, complexity, and common predictable patterns.
Is my password sent to a server?
No. Our password strength checker operates 100% locally in your web browser using JavaScript. No data is sent over the network to any server. You can safely test passwords completely offline once the page has loaded.
How does the password strength get calculated?
The tool assigns a base score depending on the length of the password. It adds points if the password contains a mix of lowercase, uppercase, numbers, and symbols. It subtracts points if it detects common dictionary words, repeated characters, or keyboard patterns (like "qwerty").
How long should a password be?
Current security standards recommend a minimum of 12 to 16 characters. Length is generally more important than arbitrary complexity. A long passphrase composed of random words is often stronger than a short password packed with symbols.
Should I reuse passwords?
Never. Reusing passwords is one of the most dangerous security mistakes. If one website you use suffers a data breach, hackers will immediately try your stolen email and password combination on thousands of other sites (a tactic known as credential stuffing).
Should I use a password manager?
Yes. A reputable password manager is the most effective way to maintain unique, highly complex passwords for every single account you own without having to memorize them.
Can a password strength checker guarantee security?
No. A high score means the password is mathematically resistant to brute-force attacks. However, it cannot protect you against phishing, malware, server breaches, or social engineering. Always enable Two-Factor Authentication (2FA) for complete protection.