laowantong/mocodo

BRMW is a free open source entity-relationship database modeling tool. We're working to make learning database modeling simple and accessible for everyone.

ERD Builder Pro is a database design and documentation tool for developers. Build ERDs, flowcharts, notes, and drawings — all in one workspace

Database design tool based on entity relation diagram

Design database schemas as ERDs in your browser, VS Code, JetBrains IDEs or Obsidian. Import SQL, DBML and GraphQL, export DDL and code, and let coding agents edit live over MCP.

Design databases the way you think. Create unlimited schemas, import existing designs, visualize relationships, export to multiple formats, and generate framework migrations. Offline-first, local by default, with optional cloud or local AI.

ER diagram generator. Paste CREATE TABLE statements and get a clean, interactive ERD — runs 100% in your browser, nothing uploaded

Database diagrams editor that allows you to visualize and design your DB with a single query.

Database Markup Language (DBML), designed to define and document database structures

Automatically generates beautiful and easy-to-read ER diagrams from your database.