Free Performance SEO Tools
Free performance tools powered by Google PageSpeed Insights — PageSpeed scores, Core Web Vitals (LCP, INP, CLS), image optimization, and lazy-load audits. Run mobile and desktop tests before a redesign ships or after a theme update changes asset loading.
Core Web Vitals Checker
Test LCP, CLS, and INP scores for mobile and desktop with Google PageSpeed Insights data. Fix Core Web Vitals issues fast. Free tool for any website owner.
Image Alt Checker
Scan any URL for images missing alt text. Improve accessibility and image search SEO. Free bulk image alt tag checker — paste URLs and get instant results.
Image Size Checker
Audit every image on a page for file size, dimensions, format, and alt text. Get optimization recommendations to boost PageSpeed. Free image SEO checker.
Lazy Load Checker
Check if images on any URL use lazy loading correctly. Identify images missing loading='lazy' that are hurting your LCP and page load speed. Free tool.
PageSpeed Checker
Check PageSpeed scores and Core Web Vitals (LCP, CLS, INP) for any URL. Get actionable recommendations to improve load time. Free Google PageSpeed tool.
FAQ
What is a good Core Web Vitals score?
Google classifies LCP under 2.5s, INP under 200ms, and CLS under 0.1 as Good. Use the Core Web Vitals Checker for field and lab data from PageSpeed Insights.
Why is my mobile PageSpeed score lower than desktop?
Mobile tests use slower network and CPU throttling. Image weight, render-blocking scripts, and layout shifts usually hurt mobile scores more than desktop.
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