🔑 Type a password to test its strength
🔒 Your password never leaves your browser. All analysis is done locally.
Free online password strength meter. Real-time password security analysis with entropy calculation, crack time estimation, and character diversity. Checks against common passwords. 100% client-side.
🔒 100% Client-Side · No UploadA strong password typically has: 12+ characters, mixed uppercase and lowercase letters, at least one digit, at least one special character (!@#$%^&*). It should not contain common words, dates, names, or keyboard patterns. Random passwords from a password manager are the most secure.
Password entropy measures randomness and unpredictability in bits. Higher entropy = more secure. Generally, ≥50 bits resists online attacks, ≥80 bits resists offline brute force. Each additional character adds about 6-7 bits of entropy.
Absolutely not. All password analysis happens locally in your browser. No data is sent to any server. You can even use this tool offline. It is 100% client-side with zero backend requests.
Crack time is estimated based on entropy and current hardware capabilities. Online attacks assume 1,000 guesses/second (rate-limited), offline attacks assume 1 billion/second (GPU brute force). Actual time depends on the attacker's hardware.