I built a Power BI theme generator:
https://www.pwrtheme.com/editor
It lets you build Power BI themes visually, preview changes, upload an existing theme JSON, continue editing it, and download a valid theme.json file.
You don’t need an account to start building/exporting. If you create an account, you can save and reuse themes.
It uses Microsoft’s official Power BI report theme JSON schema as the basis for validation, and I’m planning to keep PWRtheme updated as new schema versions are released.
I’m also working on better color palette handling. Rainbow-style themes can look great, but if too many elements use strong colors, it becomes harder to see what is good, bad, urgent, or worth paying attention to.
So I’m exploring palettes that balance normal data colors with semantic colors like red, green, warning, and neutral states.
I’d appreciate technical feedback, especially around theme JSON compatibility, import issues, or missing Power BI theme settings.
Sharing in case it’s useful for anyone who prefers a visual workflow for Power BI themes.
Thanks!