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Password Strength Checker

Check password strength and get improvement suggestions. Estimate crack time.

How to Use Password Strength Checker

1

Enter your password

Type or paste the password you want to test into the input field. Analysis begins instantly as you type.

2

Review the strength score

See the overall strength rating, estimated crack time, and detailed breakdown of what makes your password strong or weak.

3

Follow improvement suggestions

Apply the recommended changes to strengthen your password. Add length, mix character types, and avoid common patterns.

About Password Strength Checker

Password strength checker online — test how strong your password is instantly for free. Analyze password security with estimated crack time, entropy calculation, pattern detection, and common password database checks. Get actionable suggestions to improve weak passwords. See detailed breakdowns of character diversity, length, and vulnerability to brute-force attacks. Your password never leaves your browser — all analysis is 100% local and private. Ideal for creating secure accounts and auditing existing passwords.

Key Features

  • Analyze password strength in real time with instant visual feedback as you type
  • Estimated crack time display showing how long it would take attackers to break your password
  • Check against common password databases to detect frequently used and compromised passwords
  • Detailed strength breakdown showing entropy, character diversity, and pattern analysis
  • Actionable improvement suggestions to make weak passwords stronger and more secure
  • 100% private — your password never leaves your browser, all analysis happens locally on your device

Frequently Asked Questions

How to check if my password is strong enough?▾
Enter your password in our checker to see its strength rating, estimated crack time, and specific weaknesses. A strong password should show years or centuries of estimated crack time.
How to test password strength online safely?▾
Our password checker runs entirely in your browser. Your password is never sent to any server, making it completely safe to test even your most sensitive passwords.
How to make a weak password stronger?▾
Our tool provides specific suggestions. Generally: increase length to 14+ characters, mix uppercase, lowercase, numbers, and symbols, and avoid dictionary words or common patterns.
How to check if my password has been compromised?▾
Our checker compares your password against databases of commonly used and leaked passwords. If your password matches a known compromised password, it will flag it immediately.
How to understand password entropy?▾
Entropy measures randomness in bits. Higher entropy means more possible combinations. Our checker calculates and displays entropy so you can compare password strength objectively.
How to create a secure password?▾
Use at least 14 characters with a mix of uppercase, lowercase, numbers, and symbols. Avoid personal information, dictionary words, and sequential patterns like "123" or "abc".
How long should my password be?▾
At minimum 12 characters, but 14-16+ characters is recommended. Length is the single most important factor in password strength — each additional character exponentially increases crack time.
How to check password crack time?▾
Enter your password and our tool estimates how long it would take to crack using modern brute-force methods. Strong passwords show estimated crack times of centuries or more.