The Best 18 Site Relic Alternatives

  • PageSpeed Insights icon

    PageSpeed Insights

    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. javascript obfuscating, image resizing, css merging and vise versa.

    Free Open Source Mac OS X Windows Linux Chrome Firefox Firebug

  • Gtmetrix icon

    Gtmetrix

    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

  • KeyCDN Tools icon

    KeyCDN Tools

    Website speed test, DNS lookup service incl EDNS client subnet, fast geolocation for IP or hostname, HTTP response headers, FREAK attack tester and more.

    Free Web

  • WebPagetest icon

    WebPagetest

    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

  • Yahoo! YSlow icon

    Yahoo! YSlow

    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 the Firebug web development tool.

    Free Open Source Mac OS X Windows Linux Chrome Firefox Safari Opera Firebug

  • Yellow Lab Tools icon

    Yellow Lab Tools

    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

  • Google Lighthouse icon

    Google Lighthouse

    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 OS X Windows Linux

  • StatusCake Tools icon

    StatusCake Tools

    StatusCake Tools allows you to check the speed and load time of your website. Simply enter the website URL and check one of the locations from around the world you want...

    Free Mac OS X Windows Web

  • Calibre icon

    Calibre

    Performance monitoring that gives the page speed insights you need to improve customer experience.

    Commercial Web

  • WebO (Web Optimizer) icon

    WebO (Web Optimizer)

    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

  • WDT - Web Developer Tools icon

    WDT - Web Developer Tools

    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 OS X Windows Linux Python

  • neXpert icon

    neXpert

    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

  • Web Page Test icon

    Web Page Test

    Run a free website speed test from around the globe using real browsers at consumer connection speeds with detailed optimization recommendations.

    Free Personal Web