All of our results are generated as JSON; however, some of them can be converted into CSV. It depends on the type of content generated. Nothing with HTML can be converted into a CSV.
This is actually an expected behavior. The 80legs crawl result files are newline-separated JSON objects in a text file. More info https://80legs.groovehq.com/knowledge_base/topics/data-returned-from-80legs
Updated less than a minute ago