The Best 17 Yahoo! YSlow Alternatives
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15 Like
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.
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6 Like
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.
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5 Like
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....
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4 Like
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...
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3 Like
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.
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2 Like
SitePerformanceTest.com
Perform and explore an in-depth website analysis. Generate a comprehensive report to evaluate performance and usability ratings complete with improvement recommendations.
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2 Like
SiteSpeedTester.com
Evaluate the load speed and usability for any webpage. Generate a report to determine website performance with detailed efficiency recommendations and usability...
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2 Like
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...
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1 Like
Site Relic
Site Relic is a FREE toolbox where you can test your website for performance & security in seconds without user registration.
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1 Like
MachMetrics
MachMetrics continually monitors the speed of your website. So you know exactly how your pages are performing throughout the day, around the world, and on various devices
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