Password Strength Checker, private by default

What a strength checker can and cannot prove

A password strength checker can spot visible weaknesses such as short length, repeated characters, keyboard walks, dates, and common words. Those are useful signals because attackers try obvious patterns early.

No browser checker can prove that a password is safe forever. Breaches, phishing, reuse, and weak account recovery can defeat even a complex-looking password.

The strongest pattern is unique and random

The safest everyday password is long, unique, and generated randomly. Length gives attackers more possibilities to search, while uniqueness prevents one breach from unlocking other accounts.

If you can save the password in a password manager, use a long random password. If you must type it manually, use a longer random passphrase with several unrelated words.

• Use unique passwords for every important account
• Avoid names, birthdays, quotes, and keyboard paths
• Use a password manager instead of memorizing dozens of passwords
• Turn on two-factor authentication for accounts that support it

Use this as a learning tool

This checker is meant to explain why a password looks weak or strong. It does not query breach databases and does not send your password to a server.

For real accounts, the best next step is usually to generate a new unique password and save it in a trusted password manager.