Password Strength Meter

Security & Encryption

Analyze password strength with entropy calculation and security feedback.

Check Password

Password Generator

Length: 16

UpperLowerDigitsSymbols

What is Password Strength Meter?

Password Strength Meter analyses a password's security by calculating entropy bits, checking for common words, sequential patterns, and character variety. It estimates how long the password would take to crack and generates strong alternatives with the built-in password generator.

How to use Password Strength Meter

Type or paste your password

Enter the password in the input field. The eye icon toggles between masked and plain text.

Read the strength score

The colour-coded bar and label (Very Weak → Very Strong) update in real time, along with the entropy bit count.

Check the security checklist

The checklist shows which criteria your password meets — length, character types, no patterns, not a common password.

Review the crack time estimate

The estimated time to crack gives a realistic threat assessment against modern hardware.

Generate a strong password

Use the generator section to create a cryptographically random password of your chosen length and character set.

Who uses Password Strength Meter?

Security awareness training

IT administrators

Demo why short or common passwords are dangerous by showing employees their real crack-time estimates.

Password policy enforcement

Application developers

Understand what makes a password strong before implementing a password policy in your user registration flow.

Personal security audit

End users

Test existing passwords for weaknesses and generate strong replacements for critical accounts like email and banking.

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FAQ

Is my password sent to a server?+

Absolutely not. All analysis happens locally in your browser. Your password never leaves your device.

What factors determine password strength?+

Length, character variety (uppercase, lowercase, numbers, symbols), patterns, common words, and entropy bits all factor into the strength score.

What is password entropy?+

Entropy measures unpredictability in bits. The higher the entropy, the more combinations an attacker must try. 60+ bits is generally considered strong.