How to Use This Tool

1. Enter an entity name (like User, Product, Order).
2. Define its attributes using name:type format (e.g., id:int, name:varchar).
3. Click Add Entity to build your ER diagram progressively.
4. The tool displays a list of entities and automatically generates SQL CREATE TABLE statements.
5. Relationships (1:1, 1:N, M:N) can be described manually under the “Relationships” section.

FAQs

Q1. Can I draw actual ER diagrams?
This version is form-based, designed for mobile and text environments. For actual drawing, use tools like dbdiagram.io or drawSQL, or embed Mermaid.js.

Q2. Does this generate foreign keys?
Currently, relationships are entered manually. You can enhance the script to include FK constraints based on your input.

Q3. Can I export the SQL?
Yes. Just copy the SQL from the output box and use it in your SQL editor or database tool.

Q4. Can I use this on mobile or tablet?
Absolutely. This tool is responsive and works across devices.

🧩 Conclusion

The ER Diagram Creator helps you quickly design and visualize database structures without using complex or paid software. It’s perfect for students, educators, and developers who want to map entities, define relationships, and structure SQL tables for real-world applications. Whether you’re planning a schema, prototyping a new project, or testing SQL logic, this tool makes the process smooth and intuitive.

For a complete workflow, you can also try our SQL to LINQ Converter to easily transform your SQL queries into LINQ format. And if you’d like to learn more about visual database modeling concepts, check out this detailed guide on Entity Relationship Diagrams (ERDs) — it’s an excellent resource for mastering the fundamentals.