I built SQLModel, an open-source, in-browser data modeling tool. The goal is to make it easier to design and reason about database schemas visually, without needing heavyweight desktop tools or vendor lock-in.

You can model tables and relationships directly in the browser, and optionally use AI to help generate or refine schemas from descriptions. It’s aimed at data engineers, analysts, and developers who want a fast way to sketch, iterate, and share data models.

The project is early and very much a work in progress. I’m especially interested in feedback on:

usability of the modeling UI

how useful (or not) the AI assistance is

features you’d expect before using something like this in real work

Docs and source are open, and contributions or ideas are very welcome.

Happy to answer any questions.