Password Strength Checker
Test your password security and get detailed analysis with actionable improvement tips
Check Your Password Strength
Enter your password below to analyze its security level and get personalized recommendations
Your password is never stored or transmitted. All analysis happens in your browser.
Why Password Strength Matters
Strong passwords are your first line of defense against unauthorized access to your accounts. With data breaches becoming increasingly common, having a strong, unique password for each account is more important than ever.
What Makes a Strong Password?
A strong password should be long (at least 12 characters), complex (using a mix of character types), unpredictable (avoiding common words or patterns), and unique (not used for multiple accounts).
How Our Password Strength Checker Works
Our tool analyzes multiple factors including length, character variety, common patterns, and predictability. We calculate entropy (randomness) and estimate how long it would take different types of attacks to crack your password.
Note: This tool performs all analysis locally in your browser. Your password is never sent to our servers or stored anywhere.
Frequently Asked Questions
How does this password strength checker work?
Our tool analyzes your password locally in your browser using multiple criteria: length, character variety, common patterns, dictionary words, and entropy calculation. It estimates crack time using various attack methods including brute force and dictionary attacks.
Is it safe to check my password here?
Yes, absolutely! All password analysis happens locally in your browser using JavaScript. Your password is never sent to our servers, stored, or logged anywhere. The analysis is performed entirely on your device.
What makes a password strong?
A strong password should be at least 12 characters long, include uppercase and lowercase letters, numbers, and special characters. Avoid common words, personal information, and predictable patterns like "123" or "abc".
What do the crack time estimates mean?
Crack time estimates show how long it would take different types of attacks to guess your password. "Instant" means very weak, while "centuries" indicates excellent security. These are theoretical estimates based on current computing power.
Should I use the same strong password everywhere?
No! Never reuse passwords, even strong ones. If one account gets compromised, all your accounts become vulnerable. Use a unique strong password for each account and consider using a password manager to keep track of them.
How often should I change my passwords?
Modern security experts recommend changing passwords only when necessary (suspected breach, shared with someone, etc.) rather than on a schedule. Focus on having unique, strong passwords and enabling two-factor authentication instead.
What's the difference between a strong password and a passphrase?
Passphrases use multiple random words (like "correct horse battery staple") and can be easier to remember while being very secure. Strong passwords typically use a mix of characters but may be harder to remember. Both can be equally secure when done properly.
Why does my password show as weak even with special characters?
Length matters more than complexity. A short password with special characters is often weaker than a longer password with just letters and numbers. Predictable patterns (like "Password1!") are also easily cracked regardless of character types used.