SQL to Visual ERD Generator
How to use the SQL to Visual ERD Generator
Paste your CREATE TABLE SQL statements in the left pane. The tool instantly parses the schema (identifying primary keys, foreign keys, and column types) and generates an interactive, draggable Entity Relationship Diagram (ERD) on the right. You can zoom in/out and export the final diagram as a PNG or SVG for your documentation.
All processing happens locally in your browser. No SQL data is sent to any server.
SQL to ERD Generator Guide & Best Practices
How to Use
Paste your SQL DDL (CREATE TABLE) statements into the left pane. Our parser instantly walks the Abstract Syntax Tree (AST) to render a visual Entity-Relationship Diagram (ERD) on the right. You can drag nodes, zoom, and export the diagram as an SVG.
Technical Deep-Dive: SQL Normalization
Database normalization is the process of structuring a relational database to reduce data redundancy and improve data integrity. The first three normal forms (1NF, 2NF, and 3NF) focus on atomic values, eliminating partial dependencies, and removing transitive dependencies. Visualizing these relationships via an ERD is critical during the schema design phase to ensure foreign keys correctly enforce referential integrity without creating circular dependencies. Our client-side parser leverages regex-free tokenization to ensure accurate mapping of one-to-many and many-to-many relationships directly from raw SQL syntax.
FAQ
- Is my schema data sent to a server? No, all parsing and SVG rendering happens entirely in your browser using Web APIs.
- What SQL dialects are supported? We support standard ANSI SQL, PostgreSQL, MySQL, and SQLite CREATE TABLE syntaxes.
- How do I export the ERD? Click the "Export SVG" button in the toolbar after rendering.