Yahoo! YSlow Alternatives

Yahoo! YSlow is described as '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' and is an app in the web browsers category. There are more than 10 alternatives to Yahoo! YSlow for a variety of platforms, including Web-based, SaaS, Google Chrome, Mozilla Firefox and Wordpress apps. The best Yahoo! YSlow alternative is Google Lighthouse, which is both free and Open Source. Other great apps like Yahoo! YSlow are GTmetrix, Screpy, PageSpeed Insights and WebPageTest.

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Yahoo! YSlow alternatives page was last updated

Alternatives list

  1. Google Lighthouse icon

    Google Lighthouse

     23 likes
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    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. It has audits for performance, accessibility, progressive web apps, SEO and more.

    33 Google Lighthouse alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Online
    • Google Chrome
    • Mozilla Firefox
    • Node.JS
    Google Lighthouse screenshot 1
     

    • Google Lighthouse is the most popular Web-based alternative to Yahoo! YSlow.

    • Google Lighthouse is the most popular Open Source & free alternative to Yahoo! YSlow.

    • Google Lighthouse is Free and Open SourceYahoo! YSlow is also Free and Open Source
  2. GTmetrix icon

    GTmetrix

     23 likes
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    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.

    52 GTmetrix alternatives

    Cost / License

    • Freemium (Subscription)
    • Proprietary

    Application types

    Platforms

    • Online
    GTmetrix screenshot 1
     
  4. Screpy icon

    Screpy

     39 likes
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    Screpy is an AI-based web analysis tool that can analyze all pages of your websites in one dashboard and monitor them with your team. It's powered by Lighthouse and it also includes some different analysis tools (SEO, SERP, W3C, Uptime, etc).

    Cost / License

    • Subscription
    • Proprietary

    Application types

    Platforms

    • Online
    Overview
     

    • Screpy is the most popular commercial alternative to Yahoo! YSlow.

    • Screpy is Paid and ProprietaryYahoo! YSlow is Free and Open Source
  5. PageSpeed Insights icon

    PageSpeed Insights

     26 likes
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    PageSpeed Insights (PSI) reports on the performance of a page on both mobile and desktop devices, and provides suggestions on how that page may be improved.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Online
    • Google Chrome
    • Firefox
    PageSpeed Insights screenshot 1
     
  6. WebPageTest icon

    WebPageTest

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

    32 WebPageTest alternatives

    Cost / License

    • Free
    • Open Source

    Platforms

    • Online
    WebPageTest screenshot 1
     
  7. Yellow Lab Tools icon

    Yellow Lab Tools

     9 likes
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    Online test to help speeding up heavy web pages.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Online
    Yellow Lab Tools screenshot 1
     
  9. Pingdom Website Speed Test icon

    Pingdom Website Speed Test

     5 likes
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    Use this free Website Speed Test to analyze the load speed of your websites, and learn how to make them faster.

    Cost / License

    • Free
    • Proprietary

    Platforms

    • Online
    Pingdom Website Speed Test screenshot 1
     
  10. web.dev icon

    web.dev

     2 likes
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    Get the web's modern capabilities on your own sites and apps with useful guidance and analysis from web.dev.

    Cost / License

    • Free
    • Proprietary

    Platforms

    • Online
    web.dev screenshot 1
     
  11. Domsignal icon

    Domsignal

     2 likes
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    Domsignal is an all-in-one platform dedicated to empowering developers, SEO experts, sysadmins, and security researchers in their quest for website excellence. We provide a comprehensive suite of tools to help you analyze and optimize your website's performance, security...

    Cost / License

    • Free
    • Proprietary

    Application type

    Platforms

    • Online
    Test. Troubleshoot. Improve.
     
  12. cutestat icon

    cutestat

     2 likes
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    CuteStat.com is a web service for Website Owners, Webmasters and General Internet Users to retrieve information related with Domain Name, IP Address, Web Server and Search Engine Optimization (SEO).

    Cost / License

    • Free
    • Proprietary

    Application type

    Platforms

    • Online
    cutestat screenshot 1
     
  13. Checkbot icon

    Checkbot

     4 likes
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    Boost your SEO, speed and security: Checkbot for Chrome crawls your site to test you’re following over 50+ best practices. Test 1,000s of pages in minutes for broken links, duplicate content, invalid HTML, insecure forms, redirect chains and more.

    Cost / License

    • Freemium (Subscription)
    • Proprietary

    Application type

    Platforms

    • Online
    • Google Chrome
    Checkbot screenshot 1
     
  14. CYFIRMA CAP icon

    CYFIRMA CAP

     1 like
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    CAP, a predictive cyber threat visibility and intelligence analytics platform.

    Cost / License

    • Freemium (Pay once)
    • Proprietary

    Platforms

    • Online
    CYFIRMA CAP screenshot 1
     
12 of 21 Yahoo! YSlow alternatives