Client Core Web Vitals Checker
Diagnostics → Web Vitals
Inspect real-time Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and TTFB performance scores.
About this tool
About Client Core Web Vitals Checker
Client Core Web Vitals Checker is a free, browser-based tool that lets you inspect real-time Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and TTFB performance scores. It supports Diagnostics → Web Vitals. Everything runs locally on your device, so your files are never uploaded to a server. There's no sign-up, no watermark, and no limit — just open Client Core Web Vitals Checker, add your input, and get results instantly.
How to use Client Core Web Vitals Checker
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Open Page
Measures LCP, CLS, and TTFB scores.
Key features
Live Page Performance
Evaluates user experience metrics directly in browser.
100% Private
Client Core Web Vitals Checker processes your data locally in the browser. Nothing is uploaded, tracked, or stored u2014 your files never leave your device.
Completely Free
Use Client Core Web Vitals Checker as much as you want with no fees, no watermarks, and no hidden limits.
No Installation
Client Core Web Vitals Checker runs in any modern browser. There's nothing to download, install, or configure.
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