1. Json Formatter & Validator
JSON Formatter created to help with debugging. As JSON data is often output without line breaks to save space, it is extremely difficult to actually read and make sense of it. This little tool hoped to solve the problem by formatting the JSON data so that it is easy to read and debug by human beings.
Debug is a small library for logging debug messages. Since it is just a wrapper around console.log, it works in both Node and the Browser. It allows you to filter logging output without changing your source and it also outputs time differences which lets you easily tell how much time has elapsed between log message.
3. JS Hint
5. JS Bin
10. Simple State Manager
A full suite of tools puts you in control. Step through your code, manipulate the DOM, monitor network traffic, search for what you need, filter away what you don’t, and a whole lot more. Whether you are a developer or a designer, Opera Dragonfly has the tools to keep you covered.