ERD-Free is a free online tool tailored for designing Entity-Relationship (ER) diagrams and database schemas. This browser add-on operates seamlessly on Chrome, allowing users to create, manage, and visualize database tables without needing a separate server login. Users can save their designs directly to their PC as local files, ensuring easy access and portability. Additionally, for those utilizing Supabase, ERD-Free offers integration capabilities, enhancing its functionality for database management.

Key features of ERD-Free include comprehensive table creation and management, support for various relationship types (1:1, 1:N, and N:M), and index management for optimizing database performance. The tool also supports partitioning for large-scale datasets, along with organizational features like grouping and bundling designs. Users can document their tables and columns in detail, making ERD-Free a versatile choice for both novice and experienced database designers.