You need to create a web data connector. This will be a HTML webpage which then connects to the JSON. You cannot just straight up connect to the JSON (although you will be able to in the next release of Tableau).
Check out the web data connector community - the developer docs and samples are up the top.
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I've been playing with JSON data in the 10.1 beta, and it's pretty slick. Our team utilizes Trello.com for some project management/issue tracking, and Trello lets you download all of the data in JSON format. I'm currently trying to piece together a viz in Tableau that might make the cumbersome Trello UI much easier to navigate, but my experience with JSON is really limited :-(
It can be tough going from a tabular dataset world to an object oriented one like JSON or XML. I'd recommend you use one of the available JSON Viewers out there. I used to use jsonviewer.stack.hu but it appears their domain registration lapsed or something which sucks because it was awesome! This could be a good alternative - JSON Editor Online - view, edit and format JSON online
Hope youre well.
I was wondering, has the direct connection now been released in 10.2 ? I couldn't find anything about it?
Thanks in advance
Direct connection for what, JSON files on the web? You can connect to a JSON file stored locally on your PC, but not a remote one on the web unless you write a Web Data Connector.
Native support to connect directly to a remote file has been discussed in the past (I can't find the reference to it) but it doesn't seem to be possible yet.