Alternatives to Yellow Lab Tools

  • 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 recommendations on how to fix them. GTmetrix can also run daily checks (more more frequen…

    Free Web-Based

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  • 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.

    Open Source Free Linux Mac Windows

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  • 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.

    Open Source Free Firebug Firefox Chrome Linux Mac Windows

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  • DareBoost

    Without any installation, we continuously analyze your web pages to detect quality and loading times issues. At any time, you can see the evolution of the major performance indicators of your pages on your dashboard, or in your weekly emailed report…

    Freemium Web-Based

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  • 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. You can run simple tests or perform advanced testing including multi-step trans…

    Open Source Free Web-Based

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  • 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 p…

    Open Source Free Firebug Opera Safari Firefox Chrome Linux Mac Windows

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  • cutestat

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

    Free Web-Based

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  • Site Relic

    Site Toolbox for the website owner, web engineer, SEO analyst, web developer, webmaster and everyone. There are 18 testing tools at the moment including the following. Screenshot Checker - Check how does your website look like from different region …

    Freemium Web-Based

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  • 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 the website checked from. The test results allow you to view individual page ele…

    Free Mac Windows Web-Based

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  • User Probe

    It costs a lot to have a slow website. Stop gambling your users will endure slow pages. Start running performance regression now!

    Commercial Self-Hosted Web-Based

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    What is is the ultimate resource for developers of all backgrounds to learn, create, and solve on the web. It's meant to not only educate developers, but help them apply what they've learned to any site they work on, be it personal …

    Free Web-Based icon