Name Purpose URL Type Cost
Google Mobile Friendly Test Check Mobile friendliness and interstitials of a given page https://search.google.com/test/mobile-friendly Web Based Free
Mobile-Friendly Test (Bulk Testing Tool) Uses Google's API, check if your pages are mobile-friendly or if they have mobile-usability errors. Bulk Mobile-Friendly test, up to 50 URLs at the time. https://technicalseo.com/tools/mobile-friendly/ Web Based Free
Mesure from Web.dev Check Largest Contentful Paint and Cumulative Layout Shift from Core Web Vitals, HTTPs usage of a given page https://web.dev/measure/ Web Based Free
Web Vitals Chrome Extension Core Web Vitals of a given page https://chrome.google.com/webstore/detail/web-vitals/ahfhijdlegdabablpippeagghigmibma?hl=en Browser Extension Free
PageSpeed Insights Check Core Web Vitals, Field and Lab data of a given page https://developers.google.com/speed/pagespeed/insights/ Web Based Free
Core SERP Vitals Show Core Web Vitals of ranked pages in SERPs from CrUX Report (Field Data) https://defaced.dev/tools/core-serp-vitals/ Browser Extension Free
Web Page Test Web Page Performance Test of any Given Page including Core Web Vitals https://www.webpagetest.org/ Web Based Free
Search Console (Core Web Vitals report) Show From CrUX Report (Field Data) from your site pages https://search.google.com/search-console/core-web-vitals Web Based Free
Chrome UX Report logoChrome UX Report Compare Tool Compare real-world performance of sites and URLs https://crux-compare.netlify.app/ Web Based Free
Wattspeed Continously monitor Core Web Vitals for any page https://wattspeed.com/ Web Based and Browser Extension Free
Lighthouse Check Core Web Vitals, Lab data of a given page https://developers.google.com/web/tools/lighthouse Chrome Dev Tools & Browser Extension Free
PageSpeed Compare - Easy Page Speed Benchmarking Compare performance metrics of your pages against each other or your competitors using Google PageSpeed Insights (Lab and Field Data). https://pagespeed.compare/ Web Based Free
Site Speed Comparison Tool Compare site speed across results of a Google search https://tools.sandboxweb.io/site-speed-comparison-tool Web Based Free
Measure Core Web Vitals of your Websites with Google Sheets Automatically measure Core Web Vitals for multiple websites. https://www.labnol.org/core-web-vitals-200819 Google Sheets Free
Treo Site Speed Find out how fast your website is for real users. It's free and instant. https://treo.sh/sitespeed/ Web Based Free
Layout Shift GIF Generator Visualise the Core Web Vitals metric Cumulative Layout Shift (CLS) with a simple GIF https://defaced.dev/tools/layout-shift-gif-generator/ Web Based Free
Bulk Core Web Vitals Check Check up to 500 Pages of your site - whether from crawling your site, a specific list of URLs or pages ranking for a given keyword in Google https://www.experte.com/web-vitals Web Based Free
Batch Speed Bulk speed test multiple urls using Google's Page Speed checker https://batchspeed.com/ Web Based Free
JitBit - Unused CSS This free tool crawls your website for unused CSS selectors. It follows internal links recursively and looks on multiple pages https://www.jitbit.com/unusedcss/ Web Based Free
Yellow Lab Free and Open Source tool to check Web performance of any page https://yellowlab.tools/ Web Based Free
GTMetrix See how your site pages perform, reveal why they're slow and discover optimization opportunities. https://gtmetrix.com/ Web Based Free
SEOinfo A browser extension that highlights SEO configurations and issues of the browsed pages including Core Web Vitals metrics. https://www.weeblrpress.com/blog/seoinfo-our-free-chrome-and-firefox-extension Browser Extension Free
Tame The Bots JavaScript & CSS Code Usage See how much of each JavaScript & CSS file loaded on a page is actually used. https://tamethebots.com/tools/codecoverage Web Based Free
Fast or Slow Test the speed of your site from different locations from all over the world, using PageSpeed Insights metrics https://www.fastorslow.com/app Web Based Free
Daretoboost Website Speed Test and Monitoring - Up to 5 pages for free per month https://www.dareboost.com/en Web Based Freemium
Screaming Frog SEO Spider Freemium SEO Crawler (up to 500 URLs for free) offering PageSpeed Insights Integration – Lighthouse Metrics, Opportunities & CrUX Data https://www.screamingfrog.co.uk/seo-spider/ Desktop Based Freemium
Do you want me to add any new free tool or resource? Send me a tweet to @aleyda