SchemaFlow is a free online tool that lets you design database schemas by writing DBML or SQL and see the result as a live, interactive ER diagram. No login or installation required.

What databases does SchemaFlow support?

SchemaFlow supports DBML, MySQL, PostgreSQL, SQL Server (MSSQL), and Oracle database dialects.

Yes, SchemaFlow is completely free. All features run entirely in your browser — no account, no subscription.

How do I create an ER diagram with SchemaFlow?

Simply write your database schema in DBML or SQL format in the code editor on the left, and SchemaFlow will instantly generate an interactive entity-relationship diagram on the canvas on the right.

Can I export my database diagram?

Yes. SchemaFlow can generate DBML, MySQL CREATE TABLE statements, PostgreSQL DDL, and SQL Server DDL from your visual diagram.

SchemaFlow — Free Visual Database Schema Designer

SchemaFlow is a free online tool to design and visualize database schemas. Write DBML, MySQL, PostgreSQL, or SQL Server statements and see your entity-relationship diagram update in real time.

Features: interactive ER diagram canvas · DBML editor · MySQL & PostgreSQL support · foreign-key relationship visualization · dark & light theme · no login required.

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