💎 PREMIUM PRODUCT

Professional ERD Diagrams
With SQL Data Builder

While this free tool creates basic ER diagrams, SQL Data Builder Pro offers interactive, drag-and-drop ER diagrams with automatic relationship detection, export options, and real-time collaboration.

Interactive ER Diagrams - Drag, zoom, and rearrange tables
Automatic Relationship Detection - Foreign keys auto-connected
Export to PNG/PDF - Professional documentation ready
Visual Schema Designer - Design databases visually
Only $2.99/month - Professional tools at an affordable price

Try SQL Data Builder Pro

SQL Data Builder - Professional ER Diagram Tool

How to Use the ERD Generator

Creating Entity Relationship Diagrams from SQL is simple with our free tool:

Paste your CREATE TABLE statements into the textarea above. You can add multiple tables.
Click "Generate ERD" to visualize your database structure.
Review the diagram - Tables are displayed with their columns, primary keys, and relationships.
Analyze the statistics to understand your database structure.

What is an ERD?

An Entity Relationship Diagram (ERD) is a visual representation of database tables and their relationships. It shows:

📋 Tables (Entities)

Database tables represented as boxes with their columns.

🔑 Primary Keys

Unique identifiers for each table, highlighted in yellow.

🔗 Foreign Keys

Columns that reference other tables, shown in blue.

➡️ Relationships

Lines connecting tables that have foreign key relationships.

Why Use ER Diagrams?

Visual Understanding - See your entire database structure at a glance
Documentation - Share database design with team members
Planning - Design databases before writing code
Analysis - Identify missing relationships or optimization opportunities
Communication - Explain database structure to non-technical stakeholders

ERD Best Practices

Use clear table names - Descriptive names help understand the data model
Define primary keys - Every table should have a unique identifier
Establish relationships - Use foreign keys to connect related tables
Normalize data - Avoid data redundancy through proper table structure
Document relationships - Clearly show how tables relate to each other

Limitations of the Free Version

This free ERD Generator Light provides basic visualization of your database schema. For production use, consider SQL Data Builder Pro which offers:

Interactive drag-and-drop diagram editing
Export to PNG, PDF, and SVG formats
Automatic layout optimization
Real-time collaboration
Advanced relationship visualization
Database reverse engineering

ERD Generator Light

Professional ERD DiagramsWith SQL Data Builder