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Password Strength Checker
What is Password Strength Checker?
A password strength checker estimates how hard a password would be to guess from its length, character mix and common patterns, and gives tips to improve it. Your password never leaves your browser.
How Password Strength Checker helps
- Shows weak patterns before attackers do
- Explains how to improve a password
- Checks privately in your browser
How to use Password Strength Checker
- Paste or type what you want to check.
- Read the score and the pass or fail items.
- Fix anything that failed and check again.
Example
The password “Password123” rates weak because it is a common pattern, even though it has capitals and numbers.
Frequently asked questions
Is it safe to type my real password?
The check runs locally, but as a habit, test a similar password rather than a real one.
What is entropy?
A measure, in bits, of how unpredictable a password is.
Is the rating a guarantee?
No. It is an estimate and cannot replace unique passwords and two-factor authentication.
This tool runs in your browser and does not send what you type to our servers. For important accounts, use a reputable password manager and two-factor authentication.
Last updated October 7, 2026.