Compare Two Websites

See which site is faster, better optimized, and more accessible — head to head.

Head to Head

Enter two websites. We'll audit both on mobile and desktop.

Knowledge Base

Popular Guides

Free SEO & performance guides to help you ship faster sites.

Website Speed Test

Run a free website speed test on any URL. Get mobile and desktop Lighthouse scores, Core Web Vitals, and a plain-English breakdown in 30 seconds.

Core Web Vitals Checker

Check your Core Web Vitals (LCP, CLS, INP) on any URL for free. Get instant Google Lighthouse results with traffic-light thresholds and clear fix recommendations.

How to Improve Website Speed

Step-by-step guide to making your website faster. Twelve high-impact fixes ranked by effort vs reward, with real numbers and code examples — no fluff.

SEO Score Checker

Check your website's SEO score for free using Google's Lighthouse engine. Get instant feedback on titles, meta descriptions, structured data, mobile-friendliness and more.