Password Strength Checker
Check password strength with real-time analysis, crack time estimation, and improvement tips.
Check how strong your password is
Enter any password above to get a detailed strength analysis, crack time estimate, and improvement suggestions — all processed locally.
How to use Password Strength Checker
- 1
Enter your password
Type or paste any password to check
- 2
View real-time analysis
Strength score updates as you type
- 3
Check the detailed checklist
See which criteria your password meets
- 4
Review crack time
See estimated time to brute-force your password
- 5
Follow improvement tips
Get specific suggestions to make it stronger
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Frequently Asked Questions
Is my password sent anywhere?
No! Your password is checked 100% locally in your browser. Nothing is sent to any server. You can even use this tool offline.
How is crack time calculated?
We estimate based on character set size raised to the power of password length, divided by 10 billion guesses per second (modern GPU brute-force rate).
What makes a strong password?
16+ characters, mix of uppercase, lowercase, numbers, and symbols. No common patterns, repeated characters, or dictionary words.
What are common passwords?
We check against the top 20 most commonly used passwords like 'password', '123456', 'qwerty', etc. These are cracked instantly.
Should I use a password manager?
Yes! Password managers let you use unique, complex passwords for every account without memorizing them. This tool helps you verify they're strong.
Is this tool free?
Yes! Check unlimited passwords completely free with no signup required.