Password Strength Estimator

What does the Password Strength Estimator do?

The estimator starts with the password’s length and character variety, then deducts strength for patterns attackers try first: very common passwords (including local favourites like “pakistan123” and “786786”), keyboard and alphabet sequences, repeated characters, years, and the classic capital-word-then-numbers pattern. Simple letter substitutions (p@ssw0rd) are recognised too.

It shows estimated crack times for an online attack limited to 100 guesses per hour and an offline attack at 10 billion guesses per second.

Examples

Weak

“Lahore2024!” → recognised word + year + symbol pattern: weak despite meeting typical “complexity” rules.

Strong

“correct-violin-harbor-ember-55” → long passphrase, very strong.

Common use cases

• Checking a new password before using it
• Teaching staff or family about password strength
• Understanding why complexity rules are not enough

Features and benefits

• Private by design — your data is processed on your device and never uploaded.
• Free with no account, no watermark and no usage limits.
• Works on phones, tablets and desktops in any modern browser.

Limitations to know

• It cannot know whether a password has appeared in a data breach — never reuse passwords.
• Estimates are approximate; real attackers use personal information and huge leaked lists.