ERD-Free
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ERD-Free is a free online ER diagram design tool. You can design database schemas visually and export them as SQL.
ERD-Free: A Database Design & ER Diagram Tool
This is an ER Diagram program designed to assist with database design. It does not require a separate server login, allowing you to save your work directly to your PC as local files. Additionally, if you are a Supabase user, you can seamlessly integrate the tool with your Supabase database.
I believe that the most effective way to convey your intent when giving tasks to an AI is through a well-defined database structure. ERD-Free can generate outputs in SQL, MD (Markdown), and HTML formats, enabling you to provide the AI with the specific format it needs.
[Key Features]
Table Creation: Easily design and manage database tables.
Relationship Mapping: Supports 1:1, 1:N, and N:M relationship modeling.
Index Management: Create and manage indexes for performance optimization.
Partitioning Support: Design partitioned tables for large-scale data.
Design Organization: Includes "Group" and "Bundle" features to help organize complex designs.
Documentation: Add detailed descriptions to both tables and individual columns.