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OpenDBD review

Free#27 of 34 in Database Design Tools

OpenDBD combines free ER modeling, exports, migrations, and optional BYOK AI in a browser.

6.7/10Editor score
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

OpenDBD is a browser-based database schema design tool for developers, architects, and teams sketching relational structures before implementation. Its visual ER canvas covers tables, columns, types, and relationships, while templates provide starting points for common schemas. The product is free, requires no account, and stores projects, schemas, chat, and notes locally in the browser. That makes it a practical choice for lightweight design work where keeping the workspace in local browser storage is appropriate.

The strongest feature set is the combination of modeling and delivery-oriented schema management. OpenDBD supports migration script versioning and seed SQL management, then exports designs as JSON, SQL DDL, Markdown, Mermaid diagrams, or PNG images. Multi-project workspaces, notes, chat, and undo/redo give the canvas more structure than a simple diagramming tool. Users who need a free place to shape schemas and produce several handoff formats should find this breadth useful.

Its optional schema-aware AI assistant supports OpenAI, Anthropic, Gemini, OpenRouter, Ollama, and WebLLM through user-configured providers and keys. That flexibility suits users who already have an AI provider preference, while adding setup work compared with a built-in assistant. OpenDBD remains focused on browser-based schema design, versioned migrations, seed data, and exports rather than a broader shared database operations environment. Choose it for local-first design and AI-assisted sketching; choose another tool when shared team workflows or a different deployment model are central requirements.

OpenDBD pros and cons

  • Where it wins
    • Free visual ER canvas with templates and relationship modeling
    • Exports to JSON, SQL DDL, Markdown, Mermaid, and PNG
    • Local projects with migrations, seed SQL, notes, and undo/redo
  • Where it doesn't
    • AI features require user-configured provider keys
    • Web-only access may not suit offline desktop workflows
    • Local browser storage is less suited to shared team workflows

OpenDBD fact sheet, pricing and score →

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