MyPasswordChecker

A free password strength checker that runs entirely in the browser, providing entropy, GPU crack time, and quantum resistance estimates. It solves the problem of users not knowing how secure their passwords are against both classical and quantum attacks. The tool targets developers, IT professionals, executives, and general consumers, with a free tier and enterprise API. It differentiates by modeling Grover's algorithm and ensuring no data leaves the browser, with a published method and open-source code.

Key features

• Entropy calculation in bits
• GPU crack time estimation
• Quantum (Grover) crack time estimate
• Pattern detection (zxcvbn)
• Phonetic password generator
• Breach check against Have I Been Pwned
• Developer API for password scoring
• Client-side processing, no data sent