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Design database schemaseffortlessly
ERDPlus is a web-based database modeling tool that lets you quickly and easily create Entity Relationship Diagrams, Relational Schemas, and Star Schemas.
See ERDPlus in Action
Explore our powerful tools designed to simplify database design and development
Visualize your database structure before you build it. ERDs help you plan, design, and understand databases by showing how data is organized and how different entities relate to each other. ERDPlus makes it easy to create clean, accurate diagrams for academic or professional use.
Key Features & Components
Entities (regular and weak entities)
Attributes (regular, unique, multi-valued, derived, composite, and optional)
Relationships with all possible cardinality constraints
Use standard notation (Crow’s Foot, Chen, etc.)
Export diagrams for documentation or collaboration
Build ERDs quickly and intuitively
Advanced Notation:
The notation supports drawing regular and weak entities, various types of attributes (regular, unique, multi-valued, derived, composite, and optional), and all possible cardinality constraints of relationships (mandatory-many, optional-many, mandatory-one, and optional-one).
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Why choose ERDPlus?
Everything you need for professional database modeling, completely FREE
Database Modeling
Create Entity Relationship Diagrams (ERDs) and Relational Schemas with our powerful web-based tool.
Auto-Conversion
Automatically convert your ER Diagrams into Relational Schemas with a single click.
SQL Export
Generate SQL scripts directly from your diagrams for immediate database implementation.
PNG Export
Export your diagrams as high-quality PNG images for presentations and documentation.
Cloud Storage
Save your diagrams safely on our servers and access them from anywhere, anytime.
Quick & Easy
Intuitive interface that lets you create professional diagrams in minutes, not hours.
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What You Get For Free?
More Features That Make
ERDPlus Special
Automatically convert ER Diagrams into Relational Schemas
Export SQL scripts ready for database implementation
Export diagrams as PNG images for documentation
Save diagrams safely on our server with cloud access
Intuitive drag-and-drop interface
No paid features - everything is completely free