AI ER Diagram Maker

What to include in your description

List entities, important fields, identifiers and relationships. State whether relationships are one-to-one, one-to-many or many-to-many, and include optionality where known.

A practical starting point

For course registration, explain Student, Course and Enrollment, including whether a student can enroll in several courses. The Enrollment relationship may carry fields such as registration date if your project requires them.

Make a diagram in four steps

1. Connect and validate your own Gemini API key.
2. Enter a project title and abstract, then optionally add a public GitHub repository.
3. Add relevant details, choose your diagram types and review the project.
4. Check the generated blueprint and assumptions, refine the diagram and download.

What to check before you export

• Identify entities from the actual project domain.
• Check primary identifiers and relationship cardinality.
• Separate logical relationships from implementation-specific SQL details.
• Review uncertain relationships in the assumptions panel.

Choose the view that answers your question

An ER diagram is a logical view of entities and relationships. Choose Database Schema when you need physical columns, SQL types, indexes, constraints and column-level foreign keys. Drawgon does not fabricate unknown SQL types.

Diagrams use a monochrome palette by default. SVG stays vector; PNG exports at 1×, 2× or 3×. Use Download All for a ZIP containing your selected formats and project summary.

Common questions