Password Strength Checker

Live Demo: https://hackathon-11-oct-2026.vercel.app

A web-based password tester and rater designed to help users understand how secure their passwords are and how to improve them. It analyses password length, character types, common words, repeated characters, predictable patterns and known data breaches to provide a strength score from 0 to 100, ranging from Very Weak to Very Strong.

The app also asks simple yes/no questions about password reuse and personal information, such as names, birthdays and familiar words, to identify risks that automatic checks may miss. After the assessment, users receive an estimated crack time, a breakdown of potential weaknesses, practical security tips and step-by-step suggestions for improving their score. An optional AI advice feature powered by Gemma provides further guidance based on the assessment results, while a built-in password generator helps users create random passwords or passphrases.

Privacy is a key focus of the project. The app does not store passwords or password hashes, and the AI never receives the actual password. Passwords are processed for analysis and then discarded. Only derived information, such as password characteristics, assessment scores and answers to security questions, is stored to help evaluate and improve the scoring system. The optional data breach check uses a partial password hash rather than sending the password itself.

Built with Python, FastAPI, HTML, CSS, JavaScript, PostgreSQL, Gemma AI and Vercel, the project combines password security checks, clear feedback and practical recommendations in one interactive application. It also includes a password generator and optional sound effects to make the user experience more engaging.