Password Strength Checker
Check how strong a password is, with an entropy score and estimated crack time.
About Password Strength Checker
Test the strength of any password and understand why it's weak or strong. See an entropy score, an estimated time to crack it under a fast offline attack, and a checklist of best-practice requirements. Everything is evaluated locally — your password is never transmitted or stored.
How to use
- 1
Type or paste the password you want to test.
- 2
Review the strength meter and entropy score.
- 3
Check the estimated crack time and the requirements checklist.
- 4
Adjust your password until it meets every requirement.
Tip: All processing is performed locally in your browser with zero loss in quality and no upload limits.
Frequently Asked Questions
More Security Tools You Might Like
Password Generator
Generate strong, random passwords with full control over length and character types.
Random Token Generator
Generate cryptographically secure random tokens — hex, Base64, alphanumeric or UUID.
Text Encrypt / Decrypt
Encrypt and decrypt text with a password using strong AES-256-GCM encryption.