← Retour au blog
tech 14 June 2026

Free SQL to ER Diagram Tool: Runs in the Browser, Nothing Uploaded

Discover how to instantly convert your SQL schemas into interactive entity-relationship diagrams without ever leaving your browser. A practical, secure, and free tool for developers.

Article inspired by the original source
Free SQL→ER diagram tool, runs in the browser, nothing uploaded ↗ sqltoerdiagram.com

A Powerful and Accessible Tool

In the world of software development, visualizing database schemas is crucial. It not only facilitates the understanding of structure and data relationships but also aids communication among teams. This is where the 'SQL to ER Diagram' tool comes in. This free and open-source tool allows you to quickly convert a SQL schema into an interactive entity-relationship diagram (ERD) directly in your browser, without the need to sign up or download anything.

How Does It Work?

To generate an ER diagram from SQL, simply paste your CREATE TABLE statements into the tool's editor. Instantly, an interactive diagram is generated, displaying your tables, columns, primary keys, foreign keys, and all relationships. You can effortlessly drag tables, auto-arrange the layout, add notes, and finally export everything as PNG or SVG.

Compatibility with Multiple SQL Dialects

The tool supports standard SQL dialects, including PostgreSQL, MySQL, SQLite, and SQL Server. It handles primary keys, foreign keys, as well as unique and not-null constraints, offering remarkable flexibility in creating your diagrams.

Security and Privacy First

One of the great strengths of this tool is its handling of privacy. Everything runs locally in your browser, ensuring that your SQL schema never leaves your machine. This means you can work securely without worrying about leaking sensitive data.

Why Use 'SQL to ER Diagram'?

  1. Accessibility: No installation required, the tool works perfectly on both desktop and mobile.
  2. Free: Completely free and open-source, there are no hidden costs or required subscriptions.
  3. Ease of Use: With its intuitive interface, it's simple to create, modify, and export ER diagrams.

Use Cases

Consider the example of a startup building a SaaS application. The development team needs to ensure the database is well-designed and optimized. With 'SQL to ER Diagram', they can visualize the database architecture, identify potential design issues, and easily share the diagram with other team members for quick feedback.

Conclusion

A tool like 'SQL to ER Diagram' is indispensable for developers and database architects looking to optimize their workflow. Its ease of use, compatibility with different SQL dialects, and promise of security make it an essential choice.

Let's discuss your project in 15 minutes.

SQL ER Diagram Database Visualization Open Source Security
Deepthix newsletter · 100% AI · every Monday 8am

An AI agent reads tech for you.

Our AI agent scans ~200 sources per week and ships the best articles to your inbox Monday 8am. Free. One click to unsubscribe.

Visit the newsletter page →

Want to automate your operations?

Let's talk about your project in 15 minutes.

Book a call