Resume Matcher is a free, open-source AI tool designed to optimize resumes for job applications. It analyzes resumes and job descriptions, extracting relevant keywords and themes to improve ATS (Applicant Tracking System) compatibility. The tool uses advanced machine learning and vector similarity techniques to measure alignment between resumes and job descriptions, providing actionable insights for enhancement. Key features include keyword extraction, readability improvement, and deep resume analysis. Built with Python, it supports local installation, Docker, and Google Colab, with a user-friendly web interface for interactive use. The project encourages community contributions and is licensed under Apache 2.0, making it accessible for developers and job seekers alike.