Schema Builder for Structured Data
Easily build validated json-ld structured data markup for any webpage. Based on schema.org specification
Measure, visualize, and debug Core Web Vitals in real time. CrUX history, LCP/CLS/INP breakdowns and performance experiments
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Core Web Vitals Visualizer
Open the popup on any page. See your LCP, CLS, INP, FCP, and TTFB scores instantly, color-coded, live. No separate tool. No copy-pasting URLs into PageSpeed Insights.
What it shows
Real-time scores powered by the web-vitals library, the same library Chrome uses internally. Green means good. Orange means work to do. Red means it's hurting you.
LCP - Green overlay marks the LCP element on the page. Full timing breakdown: TTFB, Resource Load Delay, Resource Load Duration, Element Render Delay. For images: preload status, fetchpriority, 1st vs 3rd party origin, natural vs rendered dimensions, estimated preload savings.
CLS - Pink overlays mark every layout shift source. Click any shift to see an animated before/after replay. Attribution shows the largest shift target and score.
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Store average score: 5.0. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.
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Easily build validated json-ld structured data markup for any webpage. Based on schema.org specification
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5 Star - Reduced my work 100% to 0% - kudos to developer
Super useful extension, thanks for making this man!
非常方便,直接展示LCP CLS元素等
Estremamente utile
will make nextjs hydrate error when development: Warning: Extra attributes from the server: elementtiming
很好的工具,能方便查看各项核心指标,谢谢!
Excellent tool for debugging Web Vitals issues :))
My new favourite tool to look at Core Web Vitals scores
Great tool to visualize the Core Web Vitals