Free SQL→ER diagram tool, runs in the browser, nothing uploaded

100% local — your schema never leaves your browser. No accounts, no uploads.

Drop your CREATE TABLE statements on the left. Drag tables, scroll to zoom, double-click to rename, export when done.

SQL to ER Diagram — free online ERD generator

SQL to ER Diagram is a free, open-source tool that converts a SQL schema into an interactive entity-relationship diagram (ERD) right in your browser. Paste your CREATE TABLE statements and instantly visualize tables, columns, primary keys, foreign keys and relationships. Works with PostgreSQL, MySQL, SQLite and SQL Server. Drag tables, auto-arrange the layout, add notes, and export to PNG or SVG. Nothing is uploaded — your schema stays on your machine.

Frequently asked questions

How do I create an ER diagram from SQL?

Paste your SQL CREATE TABLE statements into the editor and SQL to ER Diagram instantly renders an interactive entity-relationship diagram. Drag tables to arrange them, then export as PNG or SVG.

Which SQL dialects are supported?

It parses standard CREATE TABLE and ALTER TABLE DDL and works with PostgreSQL, MySQL, SQLite and SQL Server syntax, including primary keys, foreign keys, unique and not-null constraints.

Is it free?

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