Page Speed Checker

The Page Speed Checker performs an AI-powered performance audit for any URL, generating Core Web Vitals estimates and a prioritized list of optimization recommendations with projected before-and-after performance improvements. Page speed is a direct Google ranking factor through the Core Web Vitals program, which measures three specific metrics: Largest Contentful Paint (LCP) for loading speed, First Input Delay (FID) and its successor Interaction to Next Paint (INP) for interactivity, and Cumulative Layout Shift (CLS) for visual stability. Sites that pass all three Core Web Vitals thresholds receive a ranking boost in Google's system, while sites with poor scores face a measurable disadvantage in competitive search results. Beyond rankings, page speed has a direct impact on conversion rates — research from Google shows that as page load time increases from 1 to 3 seconds, the probability of bounce increases by 32%, and at 5 seconds it increases by 90%. The resource optimization tips this tool provides identify the specific files, images, scripts, and rendering patterns that are slowing your page down, ranked by impact so you can fix the biggest bottlenecks first. Common high-impact recommendations include compressing and serving images in next-gen formats like WebP or AVIF, deferring non-critical JavaScript, implementing lazy loading for below-the-fold content, and leveraging browser caching with appropriate cache headers. The before-and-after projections help you build a business case for speed optimization by estimating how much each fix will improve your Core Web Vitals scores. Pro tip: prioritize LCP improvements first because it is the most heavily weighted Core Web Vital and often the easiest to fix through image optimization and server response time improvements, and focus specifically on your top-traffic pages where even small speed gains translate into measurable ranking and conversion improvements.