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

Source: Hacker News

SQL to ER Diagram — free online ERD generator: convert a SQL schema (CREATE TABLE statements) into an interactive entity-relationship diagram in your browser. Turn SQL into a diagram instantly, no signup.

  SQL to ER Diagram







    SQL schema
      
    
    




  

  

  
      

Paste SQL, see the schema.

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

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

  

  






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?

Yes. SQL to ER Diagram is completely free and open source, with no account or sign-up
  required.

Is my data private? Does my SQL get uploaded?

Everything runs locally in your browser. Your SQL schema is never uploaded to or stored
  on any server.

Can I export the diagram?

Yes. You can export a high-resolution PNG or a vector SVG, save the full project as a
  file, or copy a shareable link that encodes the diagram in the URL.

Do I need to install anything?

No installation needed. It runs entirely in your web browser on both desktop and mobile.