Skip to content

Free Online Password Strength Checker & Analyzer

Review password length, character variety, and obvious patterns with a local heuristic. This is not a security guarantee or breach check.

Enter Password
Local heuristic; no breach lookup or security guarantee
Enter a password
0%
Uniform-search estimate:

-

Assumes 10 billion guesses/second and uniformly random characters

Security Analysis
Detailed breakdown of password strength

0

Characters

0

Unique Chars

How the Password Strength Checker Works

The checker applies a local length, character-variety, and common-pattern heuristic. It does not know how a password was generated, whether it was reused or leaked, or how a real service stores it.

What Makes a Strong Password?

A strong password should be at least 12 characters long and include a mix of uppercase letters, lowercase letters, numbers, and special characters. Avoid common words, sequential patterns (like 123 or abc), and personal information.

Time to Crack Estimates

The displayed time divides the full character-set search space by an assumed 10 billion guesses per second. It is an illustration for uniformly random input, not a prediction for a human-chosen password or a particular account.

Local processing limits

The calculation does not send the entered value to a SimpleTaskTools endpoint. Browser extensions, clipboard tools, screen capture, and a compromised device are outside this page’s control; consider testing a similar example instead of an active password.

Frequently Asked Questions

Common questions about Password Strength Checker.

Related free tools

What this tool does

Estimate password characteristics for educational comparison.

How to use it

Use a made-up example and inspect the length, character variety and feedback.

Worked example

Adding characters expands the estimated search space; repeated or predictable patterns can remain weak despite a high character count.

Limitations and checks

This heuristic is not a breach-database lookup or a reliable cracking-time prediction. Prefer a password manager and do not paste a live account password into a public diagnostic page.

How your data is processed

The operation runs in your browser. Copy and download actions use your device. Where Save work is offered, a local copy is stored; eligible work can sync only under your enabled account settings. See Privacy for site analytics and storage details.

Privacy and storage details · Report an incorrect result · Browse tools