Developer Tools
Password Strength Checker
🔒 Runs in your browser
Check how strong your password is with Shannon entropy calculation, crack time estimates, and NIST 800-63B security tips. Free, instant, runs entirely in your browser.
All analysis runs entirely in your browser. Your password is never transmitted or stored.
How to Create a Strong Password (2026)
How to Create a Strong Password — free online tool and guide with examples.