Password Strength Tester - Free Online Tool

Test password strength with entropy scoring, pattern detection, and common-password checks. 100% client-side; your password never leaves your browser.

Password analysis

Checks length, character types, entropy, common passwords, repetition, sequences, and keyboard patterns.

Actionable guidance

Provides specific recommendations for improving a password.

Privacy

This tool runs entirely in your browser. No data is sent to or stored on any server.

Password Strength Tester

Analyze password strength with entropy calculation, pattern detection, and common password checks.

Your password never leaves your browser. All analysis is performed locally.