Got a backup from Skype?
wtf is a .json file? how do I look at this?
SKYPE PARSER
Microsoft has the answer here, but I’ll do with pictures.
Step 1
Click that link, expand the first option (Export or Delete etc etc) and scroll down to ‘To Extract the .tar’. In part 5 of that section the word ‘Viewer’ is blue, clicking it will download the tool. You can also just click that word here because I got your back.

Step 2
Download the .tar, extract the .tar. Click on the index.html

Step 3
Upload the .json, hit load

Note:
I have no idea if this actually works.