# Password Strength Checker

> Analyze Password Security with Real Entropy & Breach Check • No Signup • 100% Private

Free online password strength checker with entropy, crack time estimation for 3 scenarios, character analysis, and breach check via HIBP k-anonymity. 100% private browser. No signup.

URL: https://tools.scoreroute.com/tools/password-strength-checker/

Markdown: https://tools.scoreroute.com/tools/password-strength-checker/.md

## Frequently Asked Questions

No. All analysis runs locally in your browser. The optional breach check uses k-anonymity: your browser computes the SHA-1 hash, sends only the first 5 hex characters (20 bits) to HaveIBeenPwned, and compares the returned hash suffixes locally. Your full password never leaves this page.