Length first
Each extra random character makes a password much harder to crack.
Password Strength Checker
Find out how long a password would take to crack and what makes it weak. The checker looks for common passwords, hidden words, sequences, repeats and years, and tells you exactly how to improve it.
- 100% free
- No sign-up
- Your password never leaves this page
Strength—
Estimated entropy0 bits
Online attack (throttled)—
Offline attack (fast hardware)—
Checks
How to improve it
How to use
How to use the Password Strength Checker
- Type a password or one similar to it.
- Read the strength rating and estimated crack times.
- Review the checks that pass or fail.
- Follow the suggestions, or generate a strong one with our password generator.
Private by design. The check runs entirely in your browser. The password you type is never sent, logged or stored. Even so, it is good practice to test a similar password rather than your real one.
About this tool
How password strength is estimated
The checker estimates entropy from the length and types of characters, then subtracts for the shortcuts attackers really use: lists of common passwords, dictionary words with letters swapped for numbers, keyboard runs like qwerty, sequences like 123, repeated characters and years. "Karachi@2026" looks complex, but a city name plus a year is one of the first things attackers try.
Crack times are shown for two situations. An online attack against a login page is slowed by rate limits. An offline attack, after a database leak, can test billions of guesses per second on modern hardware. A strong password survives both.
Good to know
Building better passwords
Avoid personal details
Names, birthdays and cities are easy to guess or find online.
Unique for each site
Reuse turns one breach into many.
Use two-factor
It blocks most account takeovers even if a password leaks.
FAQ
Password Strength Checker FAQs
Is it safe to type my password here?
The check runs only in your browser and nothing is sent. For extra caution, test a similar password instead of your real one.
Why is my complex-looking password rated weak?
Patterns such as a word plus a year, or letters swapped for numbers, are tried early by attackers.
How accurate are the crack times?
They are rough estimates to compare passwords, not guarantees. Real attacks vary widely.
What is a good score?
Aim for Strong or Very strong, which usually means a long random password or a five-word passphrase.
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