[politelemon]

I like it, one piece of feedback I have is - the export to PNG button, I wasn't expecting it to be a screenshot of the JSON, I thought it would be the graph; at least to me that would make more sense... paste JSON, see graph, export image of graph. What do you think.

[retSava]

I agree with this. Since it's rendered as an SVG, saving it as an SVG would be great. PNG as backup perhaps.

Looks great! Thanks OP for sharing!

[lou_alcala]

Thanks for the feedback, the option to take a snapshot of the graph sounds good, I will add it to the TODO