Liam ERD is an open-source tool designed to automatically generate visually appealing and interactive Entity-Relationship (ER) diagrams from database schemas. It features a user-friendly interface with panning, zooming, and filtering capabilities, making it easy to visualize complex databases. The tool supports seamless reverse engineering, requiring zero configuration for setup, and is optimized for high performance, handling projects with 100+ tables efficiently. Liam ERD works with both public and private repositories, offering a quick start via URL modification for public schemas and an interactive CLI setup for private ones. Fully open-source, it encourages community contributions and is licensed under Apache 2.0.