Analyze performance, accessibility, best practices, SEO, resources, and optimization opportunities from one report.
Learn what each Core Web Vital measures, why it matters, and what you can improve to create a faster and more stable experience for your visitors.
LCP
Measures how quickly the largest visible content element becomes available to the visitor.
Good
≤ 2.5 seconds
INP
Measures how responsive a page is when visitors interact with buttons, links, forms, menus, and other controls.
Good
≤ 200 ms
CLS
Measures unexpected movement of visible content while the page is loading and being used.
Good
≤ 0.1
Each metric is compared against established performance thresholds. The goal is to keep the experience fast, responsive, and visually stable.
Focus on the areas that have the biggest effect on real-world page experience.
Optimize hero images, reduce server response time, remove render-blocking resources, and prioritize important content.
Reduce JavaScript execution, break up long tasks, minimize unnecessary event handlers, and keep the main thread responsive.
Reserve space for images and embeds, avoid inserting content above existing content, and control dynamic layout changes.
Test important pages after major design, content, JavaScript, or hosting changes to catch regressions early.
Core Web Vitals are user-focused performance signals designed to measure loading performance, interaction responsiveness, and visual stability. Improving these areas can create a smoother experience for visitors across mobile and desktop devices.
Performance results can vary depending on the device, network conditions, page content, server location, caching, and other factors.
Analyze your page performance and get practical recommendations for improving Core Web Vitals and overall loading speed.
Check Performance →Monitor LCP, INP, and CLS to understand how quickly your pages load, respond to users, and maintain visual stability.
View Metrics →Run detailed audits for performance, accessibility, SEO, and best practices directly against your web pages.
Run Audit →Test your website from different locations and browsers to identify performance bottlenecks and optimization opportunities.
Test Website →Inspect network requests, rendering performance, JavaScript execution, and other factors affecting your site's experience.
Open DevTools →Review real-user Core Web Vitals data and identify pages that need performance improvements across your website.
View Report →Check important Core Web Vitals and understand how your website performs for real users. Review loading speed, responsiveness, and visual stability to identify areas that may need improvement.
Useful for website owners, developers, SEO professionals, agencies, bloggers, and businesses that want to monitor and improve website performance.
The All Free Tool's Core Web Vitals Checker helps you evaluate important website performance signals that affect how visitors experience your pages.
Core Web Vitals focus on loading performance, interactivity, and visual stability. Reviewing these measurements can help you identify performance problems that may affect visitors and search visibility.
Use the checker as a practical starting point for identifying pages that may need optimization, then investigate the specific resources and code responsible for slower performance.
Core Web Vitals are a set of website performance metrics designed to measure important aspects of real-world user experience, including loading performance, responsiveness, and visual stability.
LCP measures how quickly the largest visible content element becomes rendered. It is primarily used to understand loading performance from the visitor's perspective.
INP measures how responsive a page is to user interactions. It helps identify pages where clicks, taps, or other interactions take too long to produce a visible response.
CLS measures unexpected movement of visible page elements while a page loads. A lower CLS generally indicates a more visually stable experience.
Enter the website URL you want to evaluate and run the check. The tool analyzes the available performance information and presents the relevant Core Web Vitals results in an easier-to-understand format.
Fast, responsive, and visually stable pages can provide a better experience for visitors. Monitoring Core Web Vitals can help developers and website owners discover performance issues and prioritize optimization work.
Review loading performance using the Largest Contentful Paint metric.
Evaluate how quickly pages respond to visitor interactions.
Identify unexpected layout movement that can negatively affect the browsing experience.
Enter a webpage URL and check its available performance information.
Get an easier-to-understand overview of important page experience metrics.
Useful for developers investigating website performance and optimization opportunities.
Use Core Web Vitals information as part of a broader technical SEO and performance workflow.
Use the results to identify areas that may require further performance investigation.
Check important performance metrics without complicated manual calculations.
Check website performance directly from your browser without installing additional software.
Follow these simple steps to check your website's Core Web Vitals and identify performance issues.
Open the tool and prepare the URL of the webpage you want to check.
Pro Tip: Test important landing pages and high-traffic pages individually.
Enter the complete URL of the webpage you want to analyze.
Pro Tip: Test the exact page that you want to improve rather than only checking the homepage.
Run the checker to process the submitted webpage and retrieve the available performance information.
Pro Tip: Allow the analysis to complete before reviewing the results.
Check the Largest Contentful Paint result to understand the page's loading performance.
Pro Tip: Slow LCP can point you toward large images, slow resources, or rendering delays.
Review the Interaction to Next Paint result to understand how responsive the page is.
Pro Tip: Heavy JavaScript can contribute to slow interaction responsiveness.
Check Cumulative Layout Shift to identify unexpected movement of page elements.
Pro Tip: Reserve space for images and dynamic content to reduce unexpected layout movement.
Look for metrics that indicate your page may need performance improvements.
Pro Tip: Prioritize problems that have the greatest impact on real user experience.
Inspect your page resources, scripts, images, layout, and other factors that may contribute to poor performance.
Pro Tip: Use detailed developer performance tools when you need deeper technical diagnostics.
Improve the areas responsible for slow loading, poor responsiveness, or layout instability.
Pro Tip: Make changes incrementally so you can measure which optimizations actually help.
Run another check after making improvements to see whether the performance metrics have changed.
Pro Tip: Monitor important pages regularly because new code, plugins, images, and content can affect performance over time.