Which databases are supported?

ER diagrams work for PostgreSQL, MySQL, SQL Server, Oracle, SQLite, MariaDB, and any relational database.

Can I show composite keys?

Yes. Mention which fields form the composite key and AI will annotate them correctly.

Is this useful for ORM or backend design?

Absolutely. ER diagrams help structure entities before using ORMs like Sequelize, Hibernate, Prisma, or Entity Framework.

AI-Powered ER Diagram Generation

Technical

Create ER Diagrams with AI

Describe your database schema—tables, columns, keys, and relationships—and AI converts it into a structured ER diagram with correct cardinalities and notation.

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Try ER Diagram Maker

Create your diagram instantly with AI. Describe what you need, and watch it come to life.

Chart type

Chart description

Quick examples (click to use):

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Current selected: Entity Relationship Diagram

Select a chart type and enter a description to generate a chart

Create ER Diagrams in 3 Steps

From schema description to visual database model

Describe Tables

List tables, fields, primary/foreign keys, and relationships using natural language.

AI Generates Diagram

AI builds an ER diagram with PK/FK markers, cardinalities, and structured layout.

Implement Database

Use the diagram for schema planning, migration design, documentation, or team alignment.

No signup required • No credit card needed • Make a free flow chart in seconds

ER Diagram Features

Professional database design with AI assistance

Cardinality Notation: Visualize one-to-one, one-to-many, and many-to-many relationships with correct crow’s-foot notation.
Primary & Foreign Keys: Automatically mark PK and FK fields to clarify table roles and constraints.
Data Types Included: Optionally show column data types, constraints, and nullability.
Normalization Support: Use the ER diagram to evaluate normalization and reduce redundancy.

ER Diagram Maker FAQs

Which databases are supported?: ER diagrams work for PostgreSQL, MySQL, SQL Server, Oracle, SQLite, MariaDB, and any relational database.
Can I show composite keys?: Yes. Mention which fields form the composite key and AI will annotate them correctly.
Is this useful for ORM or backend design?: Absolutely. ER diagrams help structure entities before using ORMs like Sequelize, Hibernate, Prisma, or Entity Framework.