Key capabilities
- Inspect local SQLite database files without a server
- Load common SQLite and PostgreSQL DDL
- Map primary keys, foreign keys, columns, and indexes
- Export SVG, PNG, Mermaid, and DBML
Database ERD Visualizer
Inspect tables, columns, keys, indexes, and relationships from a local SQLite database or SQLite/PostgreSQL DDL, then export the diagram as SVG, PNG, Mermaid, or DBML.
Schema source
Database files and DDL are processed in your browser. ToolRen does not request database credentials or upload schema contents.
About Database ERD Visualizer
Turn a local SQLite file or SQL schema into a clear relationship diagram. Inspect tables, columns, keys, indexes, and relationships from a local SQLite database or SQLite/PostgreSQL DDL, then export the diagram as SVG, PNG, Mermaid, or DBML. The core workflow is designed to run in your current browser.
Useful for
- Review a migration or unfamiliar schema before changing it
- Create portable database documentation
- Help a team understand table relationships faster
Frequently asked questions
Is Database ERD Visualizer free to use online?
Yes. Database ERD Visualizer opens in a modern browser and does not require desktop software installation.
What is Database ERD Visualizer useful for?
Common use cases include Review a migration or unfamiliar schema before changing it; Create portable database documentation.
Is my input or file uploaded?
The core processing workflow is designed to run locally in the browser. Key capabilities include Inspect local SQLite database files without a server, Load common SQLite and PostgreSQL DDL, Map primary keys, foreign keys, columns, and indexes; account, comments, and anonymous analytics may still create normal site requests.
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