If you are working with json and want to view it in a pretty f0rmat within Sublime, you can install an extension very quickly.
The long way on a Mac is to navigate to ~/Library/Application Support/Sublime Text 3/Packages and run this command from a terminal: git clone https://github.com/dzhibas/SublimePrettyJson.git
Restart Sublime and the open up some unformatted json and hit command+ctrl+j. It literally takes 1 minutes.
An even faster way is to use the package control. Hit command+shift+p to bring up a pop up text field and type “install package control”. This places the file “Package Control.sublime-package” into ~/Library/Application Support/Sublime Text 3/Installed Packages.
If you have this already, then just hit command+shift+p and type “package control: install package”, and then type “pretty” and select Pretty JSON. Then restart Sublime. Done! This should take 30 seconds!