Password & Secret Strength Checker
Test how strong your password really is. Get entropy analysis, estimated crack time, and specific improvement tips. All without leaving your browser.
Entropy
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Est. Crack Time
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Character Analysis
Improvement Tips
Understanding Password Strength
Weak (0–39)
Short passwords or those with only one character type. Can be cracked in seconds to minutes with modern hardware.
Fair (40–59)
Moderate length with some character variety. May resist casual attacks but vulnerable to targeted cracking.
Good (60–79)
Good length with multiple character types. Suitable for most accounts, but consider stronger for high-value targets.
Strong / Very Strong (80–100)
Long passwords with full character variety. Effectively uncrackable with current technology. Ideal for cloud secrets and admin accounts.
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Frequently Asked Questions
How is password strength calculated?
We score passwords based on length (up to 40 points), character variety including uppercase, lowercase, numbers, and symbols (up to 40 points), and bonus points for 16+ and 24+ character passwords. Entropy is calculated from the character pool size and password length.
Is my password sent to a server?
No. Everything runs 100% in your browser using JavaScript. Your password never leaves your device. There are no network requests, no logging, and no tracking.
What is password entropy?
Entropy measures the randomness of a password in bits. Higher entropy means more possible combinations for an attacker to try. A password with 80+ bits of entropy is considered very strong against brute-force attacks.