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The PostgreSQL ERD Generator is an online tool that transforms your SQL CREATE TABLE statements into a clear, interactive Entity Relationship Diagram (ERD). It helps developers, database architects, and data engineers quickly visualize their database structure without manually drawing diagrams.

Why Use This Tool?

• Instant visualization: Convert PostgreSQL DDL into a clean ERD in seconds.
• Boost productivity: Avoid manual diagramming and focus on schema design.
• Auto-detect relationships: Highlights primary keys 🔑 and foreign keys 🔗.
• Export-ready: Save diagrams as PNG or SVG for docs and presentations.

How to Use the ERD Generator

• Paste SQL DDL: Insert your CREATE TABLE statements into the editor.
• Click “Apply”: The schema is parsed and your ERD is generated.
• Pan & Zoom: Drag to move the canvas or scroll to zoom in/out.
• Infer FKs: Use the “Infer FKs” button to detect_id references automatically.
• Export: Download as PNG or SVG for documentation or sharing.

Example Input & Output

CREATE TABLE users (
  id SERIAL PRIMARY KEY,
  name TEXT NOT NULL
);

CREATE TABLE posts (
  id SERIAL PRIMARY KEY,
  user_id INT REFERENCES users(id),
  title TEXT
);

This tool is especially useful for quickly generating database diagrams during design sessions, documentation, or presentations. It saves time and ensures accuracy.