Is it safe to type my real password here?

The strength tester runs entirely in your browser — no data is sent to any server and nothing is logged. However, as a general security practice, avoid typing real passwords into third-party websites.

What is password entropy?

Entropy measures unpredictability in bits. Calculated as length × log₂(character set size). A 16-character random password using all printable ASCII (~94 chars) has about 105 bits of entropy.

What is a good password strength score?

Aim for at least 60 bits of entropy for everyday accounts and 80+ bits for critical accounts like email, banking and password manager master passwords.

Password Strength Tester — Check How Strong Your Password Is

Common Password Weaknesses

❌Too short — passwords under 12 characters are vulnerable to brute-force attacks even with complex character sets.

❌Dictionary words — common words and names are in attack wordlists and crack in seconds regardless of length.

❌Keyboard patterns — qwerty, 123456, asdfgh are the first patterns attackers try.

❌Only one character type — using only lowercase or only digits dramatically reduces the effective search space.

❌Repeated characters — aaaa1111 or password1! — predictable substitutions are well-known to attackers.

How to Use It

Open the tool

Go to Security and scroll to the Password Strength Tester.

Type a password

Type or paste a password — use a test password, not one you actually use on any site.

Review the analysis

See the strength rating, entropy score, character type breakdown and any detected weaknesses.

Improve it

Follow suggestions — increase length or enable more character types, then use the Password Generator to create a stronger one.

Pro Tips

💡Never type your actual production passwords into any website, even one you trust. Use a similar pattern to check the strength concept instead.

💡A passphrase of 5 random words (e.g. "correct-horse-battery-staple-lamp") has ~65 bits of entropy and is much easier to remember than a complex short password.

💡Enable multi-factor authentication (MFA) — even a weak password becomes much harder to exploit when MFA is required.

Frequently Asked Questions

Is it safe to type my real password?

The tester runs entirely in your browser — no data is sent anywhere. But as a general practice, avoid typing real passwords into any website. Test with a similar pattern instead.

What makes a password weak?

Short length, dictionary words, keyboard patterns (qwerty, 123456), sequential characters, single character type, and predictable substitutions (a→@, e→3).

What is entropy?

Unpredictability measured in bits. Calculated as length × log₂(character set size). Higher entropy = more guesses needed to crack. 60+ bits is a reasonable minimum.

What's a good strength score?

Aim for 60+ bits of entropy for general accounts, 80+ for critical accounts (email, banking, password manager). 100+ for very high-security contexts.

Test password strength now

Open the Password Strength Tester and check any password's entropy and weaknesses — free, private, no login.

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