Everyday / Utilities

Password Strength Checker

Evaluate the strength of your password. Find out if your password is easy to crack and get tips to improve your security.

Illustrative model only: assumes random characters and 10 billion guesses per second. Real attacks, leaked passwords and reused passwords can be much easier to guess. Do not enter a real account password.

Enter Password

Passwords are checked locally. No data is sent to our server.

SECURITY SCORE --

Requirements

At least 12 characters
Uppercase Letter (A-Z)
Lowercase Letter (a-z)
Number (0-9)
Symbol (!@#$%)

Estimated Illustrative brute-force estimate

Instantly

*Using brute-force attack

Instructions and FAQs

Detailed Analysis

See exactly what makes your password weak or strong instantly.

Private & Secure

Input is processed in your browser. We never see your password.

Crack Time

Understand how long it would take for a computer to guess your password.

What Makes a Strong Password?

A strong password acts as the first line of defense against unauthorized access to your online accounts. Hackers use sophisticated tools to guess passwords, checking billions of combinations per second.

Key Factors of Strength

Length: The single most important factor. A 12-character password is exponentially stronger than an 8-character one.
Complexity: Mixing uppercase, lowercase, numbers, and symbols increases the possible combinations (entropy).
Unpredictability: Avoid common words, patterns (like "qwerty"), or personal info (birthdays, names).

How to Create an Unbreakable Password

The best method is to use a Passphrase consisting of 4-5 random words separated by symbols, or a completely random string generated by a tool.
Weak: Password123
Strong: Correct-Horse-Battery-Staple (Passphrase)
Very Strong: Xy9#mP2!qL$v (Random)

Frequently Asked Questions

Is it safe to type my password here?

Yes. This tool runs 100% in your browser using JavaScript. Your password never leaves your device and is never sent to our servers.

What is "Entropy"?

Entropy is a measure of randomness or unpredictability. Higher entropy means there are more possible combinations, making the password harder to guess.

How often should I change my password?

Modern security guidelines suggest changing passwords only if you suspect a breach. Frequent changes often lead to users choosing weaker, easier-to-remember passwords.

Can a password be too long?

Technically, no. The longer, the better. However, some websites have outdated systems that limit password length (e.g., max 16 characters), which is bad practice.

What are the most common passwords?

"123456", "password", "123456789", "12345", "qwerty". Never use these. They are the first ones hackers try.

Should I use a Password Manager?

Absolutely. A password manager generates and stores complex unique passwords for every site, so you only need to remember one strong master password.

HOW TO USE

Review password patterns

Use a made-up sample, not an active password. Compare length and character-group feedback, and use the eye button only when safe to show text.

Example

123456 scores weak; a longer mixed sample scores higher under this simple model.

Before you use the result

The time estimate assumes random characters and a fixed guess rate. It cannot account for leaks, reuse or targeted attacks.