Free tool

ER Diagram Builder

Model entities, fields, and relationships into Mermaid ER diagrams.

Entities

Relations

Generated Mermaid

erDiagram
  USER ||--o{ PROJECT : owns
  PROJECT ||--o{ TASK : contains
  USER {
    uuid id PK
    string email
    string name
  }
  PROJECT {
    uuid id PK
    string title
    uuid owner_id FK
  }
  TASK {
    uuid id PK
    string title
    string status
    uuid project_id FK
  }