Ah okay I understood (I think), Grafana and grafana-image-render are two different things, the second is only a plug-in to render the images using chromium, as

Ah okay I understood (I think), Grafana and grafana-image-render are two different things, the second is only a plug-in to render the images using chromium, as you noted. But you can’t build a separate app to build the images, because you will have to run Grafana + the plug-in on a server. The images are rendered from the Grafana not from the local browser, indeed I don’t have to run a browser/chrome/anything, just tell to Grafana to render locally the png with the query. If you want to render the image from your local browser, yes you can, but this is another story.