Password Strength Checker
Analyze password strength locally — your password is never transmitted.
Checklist
🔒 All analysis runs in your browser. Your password is never sent to any server.
Password entropy measures unpredictability: more characters and a larger character set means more entropy. A password with 60+ bits of entropy is considered strong against offline attacks. Avoid dictionary words, personal information, and predictable patterns. Using a password manager to generate long random passwords is the most effective approach.
Frequently Asked Questions
- Strength is based on entropy: log2(character_set_size^length). The character set grows when uppercase, lowercase, digits, and symbols are present.
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