Password Strength
Check password strength with entropy analysis
What is Password Strength?
Password Strength Checker evaluates the entropy and resistance of a password against brute-force attacks, dictionary attacks, and common password lists.
When to use this tool
- Checking if an existing password is strong enough
- Testing password generation settings
- Educating users about password security
How it works
Calculates entropy based on character pool size and password length. Entropy = length × log₂(pool_size). A password with 60+ bits of entropy is considered strong. Also checks against common password dictionaries.
About Password Strength
Check password strength with entropy analysis It runs entirely in your browser — no files are uploaded to any server, ensuring complete privacy and instant results.
- •Generate strong random passwords
- •Create UUIDs v4 and v7
- •Encrypt and decrypt with AES-256
- •Check password strength and entropy
Last updated: 2025-01-15
FAQ
Check password strength with entropy analysis
Yes, completely free. No signup required.
Yes. Runs entirely in your browser, no files uploaded.
Yes, works on any device with a modern browser.
No, everything runs in your browser.