Password Strength Checker

Analyze your password to see how quickly a hacker could crack it.

About Password Strength Checker

Is your password actually secure? Find out with the Free Password Strength Checker. It's the Best Password Tester to safely test password security entirely offline in your browser.

Features

Analyzes password entropy and common patterns
Estimates the time required to brute-force the password
Checks against lists of commonly used weak passwords
Provides actionable tips to improve security
100% private—your password never leaves your device

How to Use

Type or paste your password into the input field.
Watch the strength meter update in real-time.
Read the estimated crack time.
Follow the suggestions below the meter to make it stronger.

Frequently Asked Questions

Is it safe to type my real password here?

Yes. The analysis algorithm runs entirely in your web browser. No network requests are made, meaning we never see or store what you type.

Why is my long password marked as weak?

If your password is long but consists of common words (e.g., "baseballpassword123"), hackers use "Dictionary Attacks" which can crack it instantly despite its length.

What makes a password strong?

Length is the most important factor, followed by unpredictability. A completely random 14-character string is exponentially stronger than a 10-character dictionary word.

What does "Time to crack" mean?

It is a mathematical estimate of how long a modern cluster of high-end graphics cards (GPUs) would take to guess your password by trying every possible combination.

Is it safe to type my password here?

Yes, the checking algorithm runs 100% locally. Nothing is ever sent to a server.

How does it calculate strength?

It estimates the entropy (randomness) and checks against common patterns and dictionary words.

What is a 'good' score?

Aim for a password that would take at least 'centuries' to crack.

Is this a free password strength checker?

Yes, this free password strength checker is fully accessible.

Why use the best password tester?

Because it tests your passwords securely without logging them.

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