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ERD

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What is the online ERD diagram editor?

An ERD (Entity-Relationship Diagram) visually represents a database's tables, columns, primary keys (PK), foreign keys (FK), and the relationships between tables. The DevTools Hub ERD Editor is an online ERD tool that runs right in your browser with no installation — drag tables and columns into place, connect identifying and non-identifying relationships, and set constraints such as PK, FK, UNIQUE and NOT NULL with a click.

Paste CREATE TABLE DDL from MySQL, PostgreSQL, MSSQL, Oracle or SQLite to import it as a diagram, or export your design back to SQL DDL — great for documenting existing schemas and designing new ones alike. Sign in and your diagrams are stored safely in your account so you can pick up where you left off from any device.

Frequently Asked Questions (FAQ)

Q. Is the ERD Editor free? ▼

A. Yes, it is a free online ERD diagram tool. Design tables, columns, keys and relationships, and import/export SQL DDL — all directly in your browser.

Q. Can I import or export SQL DDL? ▼

A. Yes. Paste CREATE TABLE statements from MySQL, PostgreSQL, MSSQL, Oracle or SQLite to turn them into a diagram, and export your ERD back to SQL DDL.

Q. Do I need to sign in, and is my data safe? ▼

A. Signing in with Google is required to save and load diagrams in your account. Sessions are encrypted and personal data such as your email is never exposed in the UI or API. Deleting your account removes it and all saved diagrams immediately.