Usually F12 opens these tools in most browsers (IE, Chrome, Firefox at least) on Linux and Windows, but I do not have a Mac to test Os X. Your tip also applies

Usually F12 opens these tools in most browsers (IE, Chrome, Firefox at least) on Linux and Windows, but I do not have a Mac to test Os X. Your tip also applies to Firefox, but I don't know about IE or Edge. :) I've never really had to handle really large JSON files, as I'm not a big fan of those but for smaller files I tend to be lazy and paste it in jsonlint.com. It's usually just for reference or debugging purposes (like finding the name of a property or some strange value).