Tracy

Tracy: the addictive tool to ease debugging PHP code for cool developers.

Firefox Developer Tools

Examine, edit, and debug HTML, CSS, and JavaScript on the desktop and on mobile.

Debug HTTP API calls to a back-end and between back-ends. Easy of use, clean UI, and short ramp-up time. Not a proxy, no network issues!

Displays the HTTP header. Edit it and send it.

HttpWatch: The ultimate HTTP Sniffer for Chrome, IE and iOS

The goal of this project is to adds information about the HTTP headers in three ways:

Omnibug is a plugin for the Google Chrome and Mozilla Firefox browsers to ease developing and…