About This Free SQL Schema Visualizer
This free tool lets you instantly visualize database schemas from SQL CREATE TABLE statements or DBML markup. Paste your SQL, and see an interactive Entity Relationship Diagram (ERD) with tables, columns, data types, constraints, and relationship lines using standard crow's foot notation. No signup or account required.
How to Use
- Enter your SQL CREATE TABLE statements or DBML schema in the editor on the left.
- Your diagram appears automatically on the right with tables and relationship lines.
- Drag table headers to rearrange them, or click Auto Layout for automatic positioning.
- Export as PNG, SQL, or DBML. Share via URL link or save to your browser for later.
Frequently Asked Questions
What is a SQL Schema Visualizer?
A SQL Schema Visualizer converts your database CREATE TABLE statements into a visual Entity Relationship Diagram (ERD). It shows tables as boxes with columns, data types, and constraints, connected by lines representing foreign key relationships using crow's foot notation.
What SQL syntax does this free tool support?
This free tool supports CREATE TABLE statements from MySQL, PostgreSQL, SQLite, and SQL Server. It also supports DBML (Database Markup Language). Foreign keys can be defined inline with REFERENCES or as table constraints.
Can I share my database diagrams with others?
Yes! Click the Share button to generate a URL containing your entire schema. Anyone with the link can view and edit the diagram. No accounts or signups needed.
Is this database diagram tool really free?
Absolutely! This tool is 100% free with no signup, no accounts, no limits, and no premium tiers. It runs entirely in your browser. Your schemas are saved locally on your device.
Can I export my database diagram?
Yes, you can export your diagram as a PNG image, as SQL DDL statements, or as DBML markup. The PNG export captures the full diagram at high resolution, perfect for documentation or presentations.
