Online ERD Tool

The online ERD tool provides a domain-focused environment to model databases by defining entities, their attributes, primary keys, and the relationships between entities. It supports standard diagram notation and keeps a persistent model that can evolve as requirements change.
Conceptually, users define entities, add attributes with data types, designate primary keys, and establish relationships with cardinalities. The tool validates references, detects orphan attributes, and suggests constraints to improve normalization.
Value for DBAs, data architects, developers: improved planning, better documentation, and clearer communication with stakeholders. The tool supports collaborative editing, versioning, and export of schemas to SQL, JSON, or image formats for sharing.
Core features include entity-attribute modeling, relationship types (1:1, 1:N, M:N), constraint handling, SQL export, SQL import, and model version history. Use cases include database design, data governance, and documentation generation.