ERD Diagram Maker
Draw entity relationship diagrams from text. Define entities, attributes, and relationships. Export as PNG or SVG. Free, private.
About ERD Diagram Maker
📝 Text to Schema
Define entities with attributes and types in clean Mermaid syntax. Add PK, FK markers. Relationships auto-rendered with proper cardinality notation.
🔗 Smart Relationships
One-to-one, one-to-many, many-to-many — use standard ERD notation like ||--o{, }|--||, and more. Lines drawn automatically.
📥 Export Ready
Download as SVG for database docs, or PNG for presentations and wikis. Crisp, scalable output.
🔒 100% Private
Rendering happens entirely in your browser. Your database schemas never leave your device.