Add StackRender to diagramming tools section

[KarimTamani]

Add StackRender

Tool: StackRender

Why it fits awesome-devtools

• ✅ Browser-based — Runs entirely in the browser using a local SQLite database. No server connection required.
• ✅ Open source — Self-hostable, can be run from source or with Docker.
• ✅ 100% free — No signup, no trial, no paywall, and no usage limits.
• ✅ Developer-focused — Visually design database schemas, generate SQL, and automatically create UP/DOWN migration scripts from schema changes.

What is StackRender?

StackRender is a free and open-source database schema design and SQL migration generator supporting PostgreSQL, MySQL, MariaDB, SQLite, SQL Server, and Oracle. It also includes AI-powered schema generation from natural language requirements.

Thanks for maintaining this curated list!

[github-actions]

Hey KarimTamani! Thanks for your submission! 🚀

To keep awesome-devtools instantly accessible for everyone, all tools must be:

• Browser-based — no downloads or native app installs
• Direct link — goes straight to the tool (not a multi-tool landing page)
• 100% free — no signups, trials, paywalls, or usage limits

Please make sure your PR meets these criteria. It may take some time for your submission to be reviewed — you can occasionally comment with a "bump" to bring more attention to it.

Thanks for contributing! 🙌