Password Strength Tester
Check how strong your password really is. Everything happens in your browser — nothing you type is ever stored, logged, or sent anywhere.
*We can’t check this — just a reminder. Nothing you type here ever leaves your browser.
What Does This Password Strength Tester Check?
This password strength tester analyzes what you type against several factors that determine how resistant a password actually is to cracking attempts: total length, the mix of character types used, whether it matches one of the most commonly leaked passwords, and whether it contains predictable patterns like repeated or sequential characters.
Everything happens instantly in your browser using JavaScript. Nothing you type is sent to a server, logged, or stored anywhere, which is why we still recommend testing a similar variation rather than your exact real password when checking anything tied to a highly sensitive account.
How to Read Your Results
- Strength meter gives an overall verdict from Very Weak to Very Strong based on all factors combined.
- Estimated time to crack shows roughly how long an offline attack would take against this exact password.
- Checklist breaks down which specific criteria your password meets or is missing, so you know exactly what to improve.
Why Length Beats Complexity
A common misconception is that adding more symbols automatically makes a password stronger. In reality, length has a much bigger impact. Every additional character multiplies the total number of possible combinations an attacker would need to try, while adding one more symbol type has a smaller effect. A 16-character password using only lowercase letters is often stronger than an 8-character password packed with symbols.
If your test result comes back weak, the fastest fix is usually to make it longer, not more complicated. For a password that’s both long and strong by default, try our free password generator.
Frequently Asked Questions
Is it safe to test my real password on a password strength tester?
This password strength tester runs entirely in your browser and never sends what you type to a server, so it’s safe from a technical standpoint. As a general habit, though, it’s still wise to test a similar but not identical password rather than the exact one you use, especially for highly sensitive accounts.
How does a password strength tester determine strength?
A password strength tester looks at length, the variety of character types used, whether the password matches commonly leaked passwords, and whether it contains predictable patterns like repeated or sequential characters. These factors combine to estimate how long the password would resist an automated cracking attempt.
What makes a password score as weak?
A password scores as weak if it’s short, appears on lists of commonly used passwords, relies on a single character type, or contains obvious patterns like 1234 or repeated characters. Any one of these factors significantly reduces how long a password would hold up against cracking attempts.
Does password length or complexity matter more?
Length generally matters more. A longer password made of just lowercase letters can be harder to crack than a shorter password packed with symbols, because every additional character multiplies the total number of possible combinations an attacker would need to try.
Does this password strength tester store what I type?
No. This tool analyzes what you type entirely in your browser using JavaScript. Nothing is transmitted to a server, logged, or stored anywhere. Closing or refreshing the tab clears it completely.