Top 12 Omnibug Alternatives

Get started with Google Chrome's built-in web developer tools.

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

Download HttpFox for Firefox. An HTTP analyzer addon for Firefox

Fiddler is a debugging program for websites.

HTTP proxy / HTTP monitor / Reverse Proxy

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

Displays the HTTP header. Edit it and send it.

HTTP Debugger Pro - A Professional HTTP Sniffer and Analyzer for Developers

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

Easy debugging for mobile web. Remote web inspector with zero configuration.

NetworkMiner is a Network Forensic Analysis Tool (NFAT) for Windows.

Graphical Http Client is a utility to help you test and interact with REST-based web services.