Password Strength Analyzer & Meter

Test how long it would take a computer to crack your password. Everything runs locally for total privacy.

Developer Direct route, no hidden menu

Enter password

How It Works

Type a password. The tool runs the zxcvbn algorithm locally to estimate entropy and check against dictionaries of common names, dates, and passwords. It outputs a score from 0 to 4 and provides actionable feedback.

Example

If you type 'Password123', the score is 0 because it's highly predictable. If you type 'c0rrecth0rseb@tterySt@ple', the score is 4 (Very Strong).

When to use this tool

Testing a new master password before committing to it.
Checking if your current password is built on predictable patterns.
Learning how to construct stronger passwords with better entropy.

Understanding the score

0: Very Weak - Guessed instantly.
1: Weak - Guessed in seconds.
2: Fair - Guessed in hours or days.
3: Strong - Guessed in months or years.
4: Very Strong - Guessed in centuries.

Frequently Asked Questions

Is my password sent to a server?

No. All password strength analysis happens locally in your web browser. Your password is never transmitted.

How is the score calculated?

We use the industry-standard zxcvbn library, which checks against known dictionaries, predictable patterns, and entropy rules to estimate cracking time.