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. YSlow grades web page based on one of three predefined ruleset or a user-defined ruleset. It offers suggestions for improving the pages performance, summarizes the pages components, displays statistics about the page, and provides tools for performance analysis, including Smush.it™ and JSLint.

KeyCDN Tools

Website speed test, DNS lookup service incl EDNS client subnet, fast geolocation for IP or hostname, HTTP response headers, FR ...

AnalyzeSiteSpeed.com

Analyze Site Speed. Generate comprehensive speed reports for any web page to evaluate performance and efficiency recommendations.

PageSpeed Insights

PageSpeed is addon for Firebug (debugger addon for Mozilla Firefox ) for analyzing of page loading process and suggesting to w ...

Gtmetrix

GTmetrix is a free tool that analyzes your page's speed performance. Using Page Speed and YSlow, GTmetrix generates scores for ...

Calibre

Monitor performance of your apps and sites through the eyes of your users

Monitor

Track what your users see and feel with cont ...

DareBoost

Without any installation, we continuously analyze your web pages to detect quality and loading times issues. At any time, you ...

SiteSpeedTester.com

Evaluate the load speed and usability for any webpage. Generate a report to determine website performance with detailed effici ...

SiteSpeedAnalysis.com

Site Speed Analysis. Generate comprehensive speed reports for any web page to evaluate performance and efficiency recommendati ...

Google Lighthouse

Lighthouse is an open-source, automated tool for improving the quality of web pages. You can run it against any web page, publ ...

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 applica ...

Site Relic

Site Toolbox for the website owner, web engineer, SEO analyst, web developer, webmaster and everyone. There are 18 testing too ...

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 th ...

Checkbot

Checkbot for Chrome crawls your website to check you’re following over 50 best practices that boost your SEO, speed and securi ...

WebPagetest

Run a free website speed test from multiple locations around the globe using real browsers (Firefox, IE, Chrome, Android and i ...

SitePerformanceTest.com

Perform and explore an in-depth website analysis. Generate a comprehensive report to evaluate performance and usability rating ...

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