This is my new project that adds an interactive read-only SQL querying interface to any Django+PostgreSQL project.
The interface is protected by Django authentication: you can execute one or more SQL queries, copy the URL and share it with your collaborators on that project.
You can also create a saved dashboard and make that available to the wider world. Here are a couple of examples of saved dashboards that I'm running on my personal blog:
https://simonwillison.net/dashboard/tag-cloud/
https://simonwillison.net/dashboard/code-examples/?search=re...