I’m using an incoming webhook to send messages to slack. I want colored text and formatted tables in my messages – which slack seems to have made an effort to prevent – so the only way it seems I can do it is to attach an image – ie I’ll write text and tables into an image and then attach it as an image.

however – I don’t have an always available to everyone and easy to write to store for those images – I really want to put the image into the message. Is it possible to do that in some way? I tried converting the image to a data url – and it didn’t seem to work, but I’m wondering if I did something wrong.