Question 1

How do I generate an ER diagram from SQL?

Accepted Answer

Paste one or more CREATE TABLE DDL statements into the input area and click Generate. The tool parses each table's columns, data types, primary keys, and foreign keys, then renders an entity-relationship diagram showing tables as boxes and relationships as connecting lines. All processing happens in your browser.

Question 2

What SQL dialects does the ER diagram tool support?

Accepted Answer

The tool supports standard SQL CREATE TABLE syntax used by MySQL, PostgreSQL, SQLite, and most other relational databases. It handles column definitions, PRIMARY KEY constraints (both inline and table-level), FOREIGN KEY references, NOT NULL, DEFAULT values, UNIQUE constraints, and various data types.

Question 3

Can I download or export the ER diagram?

Accepted Answer

Yes. Click the Export as PNG button to download the current diagram as a PNG image. You can also use the Zoom buttons to adjust the view. The diagram renders on an HTML Canvas element for crisp output at any size.

Question 4

Is my schema data safe when generating ER diagrams?

Accepted Answer

Absolutely. All DDL parsing and diagram rendering happens client-side in your browser using JavaScript. Your schema definitions never leave your device. No server-side processing, no logging, no data collection.

SQL ER Diagram Generator

CREATE TABLE DDL Input

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