Password Strength Checker

About the Password Strength Checker

Check how strong a password is with length, variety and character-class feedback plus an entropy estimate. Improve it until it is green.

Everything runs in your browser — nothing is uploaded.

How to use the Password Strength Checker

Step 1Type or paste your input.
Step 2The output updates live as you type.
Step 3Copy or download the result when ready.

When people reach for this tool

See how a candidate password scores

A quick check catches the obvious problems before you commit to remembering something weak.

Find which change would improve it most

Length usually moves the score more than another special character does.

See what a minimum standard actually rejects

Testing a few examples against a rule reveals how the rule behaves in practice.

Practical tips

Read the character-class feedback rather than the headline score. It tells you what is actually missing.
An entropy estimate is only as good as the assumptions behind it, so treat it as guidance rather than a guarantee.

What you get

Live results while you type
Runs entirely in your browser
Copy and download with one click

Password Strength Checker — FAQ

Is my password sent anywhere?

Never. The strength check runs entirely on your device.

What makes a strong password?

Length above all, plus a mix of character classes and no dictionary words.

Is a strong score a guarantee of safety?

No. It reflects length and character variety, not whether the password is a well-known phrase or has appeared in a breach. Nothing but a unique, long password protects a reused credential.

Does the check send my password anywhere?

No. Every calculation happens in the page. Nothing you type is transmitted, stored or logged.