Instantly test LCP, CLS, FCP, TTFB, TBT, TTI and more for any URL. Get Google-standard performance scores, SEO audits, accessibility checks & actionable recommendations in seconds.
Enter any URL to analyze performance, SEO, accessibility & best practices instantly
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Everything you need to measure, understand, and improve your website's Core Web Vitals and overall search engine performance.
Measure LCP, FCP, CLS, TTFB, TBT, TTI, and Speed Index in real-time with accurate, live progress feedback for each analysis step.
Deep-dive into title tags, meta descriptions, heading structure, canonical URLs, robots directives, and structured data compliance.
Identify missing alt tags, viewport issues, charset declarations, and other accessibility barriers that affect user experience and SEO.
Check HTTPS implementation, X-Frame-Options headers, async/defer scripts, and other security and performance best practices.
Validate Open Graph and Twitter Card meta tags that control how your content appears when shared on Facebook, Twitter, LinkedIn, and more.
Detect JSON-LD structured data types, identify missing schema opportunities, and ensure search engines understand your content correctly.
Get prioritized, categorized improvement suggestions with clear explanations — critical issues first, so you know exactly what to fix and why.
Copy your complete analysis to clipboard or download a detailed TXT report to share with developers, clients, or your SEO team.
Identify images missing alt attributes, lazy loading, or explicit dimensions — three of the most common causes of poor Core Web Vitals scores.
Three simple steps to get a complete performance and SEO report for any website.
Paste any publicly accessible URL into the input field. The tool validates your URL in real time and adds HTTPS automatically if needed. Supports all domains including subdomains and subdirectories.
Our tool fetches your page, parses the HTML, measures Time to First Byte, calculates Core Web Vitals estimates, audits meta tags, images, links, headings, scripts, and structured data — all with a live progress bar.
Explore your Performance, SEO, Accessibility, and Best Practices scores. Review Core Web Vitals metrics, tab through detailed audits, and follow prioritized recommendations. Download or copy your full report for your team.
Core Web Vitals are a set of real-world, user-centric performance metrics introduced by Google to measure the quality of user experience on any web page. They form a key part of Google's Page Experience ranking signals and directly influence your position in search engine results pages (SERPs). Understanding and optimizing these metrics is no longer optional — it is an essential component of modern technical SEO strategy.
The three primary Core Web Vitals are: Largest Contentful Paint (LCP), which measures loading performance and should ideally occur within 2.5 seconds of page load; Cumulative Layout Shift (CLS), which quantifies visual stability by tracking unexpected layout movements and should stay below 0.1; and First Input Delay (FID) — now succeeded by Interaction to Next Paint (INP) — which measures responsiveness and should remain under 200 milliseconds. Additional supporting metrics include First Contentful Paint (FCP), Time to First Byte (TTFB), Speed Index, and Total Blocking Time (TBT).
From an SEO perspective, failing Core Web Vitals thresholds can suppress your rankings, particularly for competitive queries where multiple pages offer similar content quality. Conversely, websites that consistently pass all CWV thresholds earn a ranking advantage. Beyond rankings, strong Core Web Vitals reduce bounce rates, increase session duration, and improve conversion rates — since users are far more likely to engage with pages that feel fast and stable.
Best practices for optimizing Core Web Vitals include: serving images in next-gen formats (WebP, AVIF) with explicit width and height attributes to prevent layout shifts; implementing lazy loading for below-the-fold images; minimizing render-blocking JavaScript and CSS; using a Content Delivery Network (CDN) to reduce TTFB; enabling text compression (Gzip or Brotli); and prioritizing critical resource loading with preload hints. Regular monitoring using tools like this Core Web Vitals Tester, Google Search Console, and Lighthouse ensures you maintain good scores as your site evolves.
Everything you need to know about Core Web Vitals and this tool.
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