New free tool

Password Strength Checker

Review password quality locally before using it, with no account and no backend call.

Quick answer

A password strength checker flags short, repetitive, common, or predictable passwords.

Longer passwords with varied characters and fewer patterns usually score better.

Best inputs

Prefer length

A longer passphrase often beats a short complex-looking password.

Avoid predictable text

Names, keyboard walks, repeats, and common words reduce quality.

Password input

Check length, variety, repeated characters, and common weak patterns locally.

Try a common strength check

Password

The check runs in your browser. Do not paste passwords you cannot safely display on this device.

Strength result

Use this as a practical quality check, not as a guarantee of account safety.

Score

100/100

Strong

Harder to guess for everyday use

At least 12 characters

At least 16 characters

Lowercase and uppercase letters

Numbers included

Symbols included

No common weak word

No obvious repeated character

No obvious keyboard sequence

Example

Compare a short password such as password123 with a longer passphrase that includes several unrelated words and separators.

Assumption

The score is a heuristic based on visible password features, not a full breach database lookup.

Limitation

It cannot know whether a password has been reused, leaked elsewhere, or protected by multi-factor authentication.

Suggested workflow

Password quality workflow

Check a password, generate a stronger one if needed, then fingerprint notes or files locally.

Step 1

Check strength

Review length, variety, and common weak patterns.

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Step 2

Generate password

Create a strong random password locally.

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Step 3

Hash values

Generate SHA hashes for exact text values when needed.

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Related tools

Related security tools

Password Generator

Generate strong random passwords locally.

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Hash Generator

Generate SHA hashes for text values.

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File Hash Checker

Calculate local file checksums.

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Unix Permission Calculator

Calculate chmod permissions.

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Frequently asked questions

Does this password checker upload my password?

No. The strength check runs locally in your browser.

What does the score measure?

The score considers length, character variety, unique characters, common weak patterns, repeats, and simple sequences.

Is this a security guarantee?

No. It is a practical quality check, not a guarantee that an account or password is secure.

Should I paste real passwords?

Only paste a password when you trust the device and screen privacy. The tool is local, but your physical environment still matters.