Password Strength Checker
Test how strong your password actually is. This tool calculates entropy, estimates crack time, and tells you exactly what to improve — all in your browser with zero data sent anywhere.
🔒 This tool runs entirely in your browser. Your password is never transmitted anywhere.
Frequently Asked Questions
Is it safe to type my password here?
Yes. This tool runs entirely in your browser using JavaScript. Nothing is transmitted. You can disconnect your internet before testing to verify.
What makes a strong password?
Length is the most important factor. A 20-character random password with mixed types is vastly stronger than a shorter complex one. Use a password manager to generate and store strong passwords. Pair it with Flaru to keep your security searches private.
What is entropy in a password?
Entropy measures randomness in bits. Each additional bit doubles the number of possible combinations. Aim for 70+ bits for important accounts. This requires either a long passphrase or a random mix of all character types.
Pair strong passwords with NordPass — an encrypted password manager from the makers of NordVPN. It generates, stores, and autofills strong passwords across all your devices.
