GTmetrix is a widely‑used website performance analysis tool that combines Google PageSpeed and YSlow metrics. If you’re looking for free SEO‑focused tools that can audit speed, Core Web Vitals, and overall site health without a paid subscription, the list below offers 20 solid alternatives.
Get targeted exposure with custom position pinning and highlighted placement.
Google’s own analyzer that provides performance scores, recommendations, and Core Web Vitals data for both mobile and desktop.
Open‑source testing platform that lets you run tests from multiple locations, browsers, and connection speeds, delivering detailed waterfall charts and filmstrips.
Built‑in Chrome auditing tool that evaluates performance, accessibility, SEO, and best practices, generating a comprehensive report with actionable tips.
Free tier of Pingdom’s speed testing service, offering a quick performance grade, load time, and suggestions for improvement.
Provides a free performance analysis with a score, detailed recommendations, and a visual waterfall view (limited to a few tests per month).
Open‑source framework that runs automated performance tests (Lighthouse, WebPageTest) on a CI pipeline and produces easy‑to‑read HTML reports.
Free online tool that analyses page speed, JavaScript, CSS, and provides a visual score with suggestions to reduce bloat.
Offers a single free test per day from a global location, delivering performance grades, load time, and a waterfall breakdown.
Free SEO audit tool that checks page speed, mobile friendliness, and other on‑page factors, delivering a concise report with improvement tips.
Provides a free site health check focusing on speed, mobile usability, and Core Web Vitals, with clear visual indicators.
Free SEO suite that includes site crawl, on‑page analysis, and page speed checks for up to 20,000 indexed pages.
Free webmaster dashboard that offers site audit, performance insights, and Core Web Vitals data for verified sites.
Limited‑free crawl tool that highlights performance issues, broken links, and basic speed recommendations.
Desktop crawler (up to 500 URLs) that reports on page speed, redirects, and other technical SEO factors.
Free online tool that evaluates page speed, mobile friendliness, and overall SEO health, providing a score and actionable steps.
Offers a limited free site audit that includes performance metrics, Core Web Vitals, and suggestions for optimization.
WordPress plugin that adds on‑page SEO analysis, including page speed and Core Web Vitals checks directly in the editor.
Free Google service that reports real‑world Core Web Vitals data for your site, highlighting pages that need speed improvements.
Provides a free site health scan that includes performance metrics, mobile friendliness, and page speed insights.
Open‑source performance monitoring suite that can be self‑hosted to run Lighthouse and WebPageTest analyses on a schedule.