550 Like Firebug Good alternative? YES NO Firebug integrates with Firefox to put a wealth of web development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript... Free Open Source Mac Windows Linux Firefox Firefox extension Add a feature Discontinued The Firebug extension isn't being developed or maintained any longer. The team advised to use the built-in https://alternativeto.net/software/firefox-developer-tools/ , which ship with Firebug.next Last version of Firebug, 2.0.18, released October 7, 2016, is still compatible with Firefox, but only if the browser's multi-process architecture is not enabled.
13 Like Gtmetrix Good alternative? YES NO GTmetrix is a free tool that analyzes your page's speed performance. Using Page Speed and YSlow, GTmetrix generates scores for your pages and offers actionable... Free Web Performance Monitoring Add a feature
14 Like PageSpeed Insights Good alternative? YES NO PageSpeed is addon for Firebug (debugger addon for Mozilla Firefox ) for analyzing of page loading process and suggesting to webmaster how speed up page loading. Free Open Source Mac Windows Linux Firebug Chrome Firefox No features added Add a feature
5 Like WebPagetest Good alternative? YES NO Run a free website speed test from multiple locations around the globe using real browsers (Firefox, IE, Chrome, Android and iOS) and at real consumer connection speeds.... Free Open Source Web No features added Add a feature
4 Like Yellow Lab Tools Good alternative? YES NO Yellow Lab Tools checks a website for both it's performance and the quality of the HTML, CSS and JavaScript code. The application is available online and as... Free Open Source Web No features added Add a feature
2 Like Google Lighthouse Good alternative? YES NO Lighthouse is an open-source, automated tool for improving the quality of web pages. You can run it against any web page, public or requiring authentication. Free Open Source Mac Windows Linux Code review Add a feature
3 Like Site monitoring Good alternative? YES NO Free open-source website monitoring software, easy to set up and use for monitoring web sites. You can monitor single web pages, multiple web pages, pages in sitemap and... Free Open Source Mac Windows Linux Uptime Monitoring Add a feature
5 Like Yahoo! YSlow Good alternative? YES NO YSlow analyzes web pages and suggests ways to improve their performance based on a set of rules for high performance web pages. YSlow is a Firefox add-on integrated with... Free Open Source Mac Windows Linux Firebug Chrome Safari Opera Firefox No features added Add a feature
1 Like Site Relic Good alternative? YES NO Site Relic is a FREE toolbox where you can test your website for performance & security in seconds without user registration. Freemium Web No features added Add a feature
1 Like WDT - Web Developer Tools Alternative? YES NO WDT - Web Developer Tools is a suite of useful tools for web developers Task Manager Dean Edwards Javascript Compressor JSMin Css Minifier Css Type Set... Free Open Source Mac Windows Linux Python WYSIWYG Support Add a feature Discontinued Last update was on July 7th, 2011.
2 Like PageSpeedAlarm.com Alternative? YES NO Be notified if your Google PageSpeed falls. Free Web No features added Add a feature Discontinued Now redirects to https://www.orbonline.co.uk/
1 Like WebO (Web Optimizer) Good alternative? YES NO This project has been launched after the Russian web conference ClientSide2007. The goal was to gather not only theoretical information about websites speeding-up, but... Free Web No features added Add a feature
0 Like neXpert Good alternative? YES NO neXpert is an add-on to Fiddler Web Debugger which aids in performance testing web applications. neXpert was created to reduce the time it takes to look for performance... Free Windows No features added Add a feature
