Analyze your passwords in real-time to understand their security. Our free tool shows exactly what makes passwords strong or weak, all processed locally in your browser—completely private, no data stored.
Enter a password to see its strength
Completely Private: Your password is analyzed locally in your browser and never transmitted to our servers. No storage, no logs, no tracking. Once you've checked your password strength, use our free password generator to create stronger alternatives.
While our tools help you create and check passwords, a professional password manager ensures all your passwords are automatically generated, stored securely, and filled in seamlessly across all your devices.
Trusted by millions of users worldwide
Real-time analysis of character diversity, entropy, and common vulnerability patterns
See password strength analysis as you type. Understand specific weaknesses, view your entropy score, and learn exactly what's needed to improve security.
All analysis runs locally in your browser. Your passwords never leave your device, are never sent to servers, and are never stored anywhere.
No cost, no account required, no hidden fees. Check unlimited passwords for free, then create stronger ones with our free password generator tool.
Understand password strength, learn security best practices, and explore related security tools. Use our weak password detector to identify risky patterns and our free password generator to create secure alternatives.
Weak passwords are the primary target of attackers. Automated tools and massive databases of compromised passwords mean weak credentials can be cracked in seconds. Hackers test millions of common password combinations against accounts daily.
Our password strength checker analyzes your passwords against real attack methods, showing you exactly what makes passwords vulnerable. Use our weak password detector to identify dangerous patterns and our common password detector to check if your password has been compromised in known breaches.
Our tool evaluates multiple security factors including password length, character type diversity, pattern detection, and comparison against databases of weak passwords. It calculates password entropy—a measure of unpredictability—and estimates how long it would take to crack using modern attack methods.
All analysis happens entirely in your browser. Your password is never transmitted to our servers, never stored anywhere, and never logged. You maintain complete privacy throughout the security assessment process.
Start by checking all your existing passwords to identify which ones need updating. Use our tools in sequence: strength checker reveals weak passwords, weak password detector identifies specific vulnerabilities, and our free generator creates secure replacements.
For comprehensive security, use a password manager to generate unique, strong passwords for every account. This prevents password reuse—one of the biggest security risks. Check our reuse detection tool to find duplicate passwords you may be using across multiple accounts.
Your passwords are analyzed entirely in your browser. No data is ever transmitted to our servers, ensuring complete privacy.
Instant feedback as you type, with detailed explanations of what makes your password strong or weak.
Based on current cybersecurity best practices and real-world attack methods used by security professionals.
Common questions about password strength, security best practices, and how to protect your accounts
Strong passwords typically have at least 12 characters combining uppercase letters, lowercase letters, numbers, and special characters. Length matters more than complexity—a 16-character password is significantly stronger than an 8-character one, even with special characters.
Avoid easily guessable information like names, birthdates, or common words. Strong passwords should be random and not contain predictable patterns. Use our free password generator to create random passwords instantly, and use our entropy calculator to understand the complexity of your passwords.
Our password strength checker is completely safe because it runs entirely in your browser using JavaScript. Your password is never sent to our servers or stored anywhere—all analysis happens locally on your device.
When using any online password tool, verify that processing happens client-side and that no data is transmitted to external servers. For additional security checks, use our common password detector to verify your password hasn't appeared in known breaches, and our weak password detector to identify vulnerable patterns.
Change passwords immediately if you suspect compromise or if a service announces a data breach affecting your account. Modern security practices focus on using strong, unique passwords for each account rather than changing passwords frequently.
For most accounts, unique and strong is more important than regular changes. A password manager helps you maintain unique, complex passwords across all your accounts without the burden of remembering them or changing them unnecessarily.
Password managers are essential for good password security. They generate unique, strong passwords for each account and securely store them, eliminating password reuse—one of the biggest security risks. Detect duplicate passwords using our password reuse checker.
Modern password managers offer additional features like breach monitoring, secure password sharing, and automatic password updates when breaches are detected. Combined with tools like our strength checker and our free password generator, password managers provide comprehensive account security.