Check any password instantly with a free password strength checker that analyzes length, character variety, and common weak patterns in real time.
Enter a password to see its strength
Completely Private: Your password is analyzed locally in your browser. Once you have checked your password strength, use our password generator to create stronger passwords in seconds.
Real-time analysis of character diversity, entropy, and common password weaknesses
See password strength results as you type. Understand weak points, review entropy, and learn exactly how to improve your password quickly.
All analysis runs locally in your browser. Your passwords never leave your device and are never stored or shared.
No cost, no account required, and no hidden fees. Check unlimited passwords for free, then create stronger ones with our free password generator.
Learn what makes a password strong, follow practical security habits, and explore related tools. Use our weak password detector to spot risky patterns and our free password generator to create stronger alternatives.
Weak passwords are a common target for attackers. Automated tools and large databases of leaked credentials mean weak passwords can be cracked quickly. Hackers test millions of common combinations against accounts every day.
Our password strength checker evaluates your password against real attack methods and shows exactly what makes it vulnerable. Use our weak password detector to spot dangerous patterns and our common password detector to check whether your password appears in known breaches.
Our tool evaluates multiple security factors, including password length, character variety, pattern detection, and comparison against common weak password lists. It calculates entropy, which measures how unpredictable a password is, and estimates how long it might take to crack.
All analysis happens entirely in your browser. Your password is never transmitted to our servers, stored, or logged, so you keep full privacy while checking it.
Start by checking your existing passwords to find the ones that need updating. Use our tools in sequence: the strength checker reveals weak passwords, the weak password detector highlights specific issues, and our free generator creates secure replacements.
For stronger account security, use a password manager to create unique passwords for every site. This helps prevent password reuse, which is one of the biggest risks. Check our reuse detection tool to find duplicates across accounts.
Your passwords are analyzed entirely in your browser. No data is ever transmitted to our servers, so your privacy stays protected.
Instant feedback as you type, with clear explanations of what makes your password strong or weak.
Built around current cybersecurity best practices and the real-world attack methods used by security professionals.
Common questions about password strength, security best practices, and how to protect your accounts
Strong passwords usually have at least 12 characters and include a mix of uppercase letters, lowercase letters, numbers, and special characters. Length matters more than complexity, so a 16-character password is much stronger than an 8-character one.
Avoid easily guessable details such as names, birthdays, or common words. Use our free password generator to create random passwords instantly, and our entropy calculator to understand how complex they are.
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, and all analysis happens locally on your device.
When using any online password tool, make sure the processing happens client-side and that no data is transmitted to external servers. For extra checks, use our common password detector to see whether your password appears 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 breach affecting your account. Modern security best practice focuses on using strong, unique passwords for each account rather than changing them too often.
For most accounts, uniqueness and strength matter more than frequent changes. A password manager helps you keep unique, complex passwords across all your accounts without the burden of remembering them.
Password managers are essential for good password security. They generate unique, strong passwords for each account and store them securely, which helps prevent password reuse, one of the biggest risk factors. Detect duplicates with our password reuse checker.
Modern password managers also offer features such as breach monitoring, secure sharing, and automatic updates when a breach is detected. Combined with tools like our strength checker and our free password generator, they provide strong overall account protection.
All processing happens locally in your browser. No data is stored or transmitted.