Password Strength Meter & Cracking Time Calculator | Secure Passwords

Security Checkup

Instantly check your password’s security and estimate its cracking time.

Test Your Password

Strength Level: Empty

Estimated Cracking Time:

N/A

Tips will appear here as you type.

Frequently Asked Questions

A **strong password** is long (12+ characters), uses a mix of character types (uppercase, lowercase, numbers, and symbols), and avoids common dictionary words, personal information, or repetitive patterns.

It’s based on **entropy** (the mathematical measure of randomness). We calculate the total number of possible combinations (keyspace) for your password and divide it by a theoretical attack rate (e.g., billions of guesses per second by a high-end GPU cluster). The result is an estimated time, which is for demonstrative purposes and assumes a worst-case scenario attack.

Absolutely not.

All calculations are performed locally in your web browser using JavaScript. The text you type never leaves this page or touches our servers, ensuring your privacy and security.