HTML is the best format for the web and human consumption of data - you are reading it now.
JSON is better suited to data transfer that doesn't need to (but can) be read by humans.
CSV (what LoyceV is doing) is best for import/export of data.
Html is certainly the best way to deliver data to the user.
But you cannot work with data in html.
For example, how will you group LoyceV blockdata in html format by miners? Html cannot do that. Or how will you calculate an average of all transaction size?
You need to convert the file to some better format for data analysis.
To make data analysis in the web you will need to use javascript. Javascript has a very limited way to work with csv. So you need to convert it to json , work data in javascript, then deliver it to html.
Csv is good to work in python/pandas, not js