Analyze password strength with entropy, pattern detection and crack time estimation
A password strength checker analyzes your password's security by calculating entropy (randomness in bits), detecting common patterns like keyboard walks and repeated characters, and estimating how long a brute-force attack would take. This tool runs entirely in your browser — your password is never sent to any server.
Type or paste a password into the input field. Use the eye icon to toggle visibility.
See your password strength score from 0-100 with a color-coded rating.
View estimated time to crack assuming 10 billion guesses per second.
Follow the improvement tips to strengthen your password.
Generate strong, random passwords with customizable length, symbols, numbers and uppercase letters.
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