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Core Web Vitals Grader

Analyze your site's performance and Core Web Vitals to improve SEO rankings.

infoWhat is Core Web Vitals Grader?

Core Web Vitals Grader measures LCP, FID, and CLS using the PageSpeed API to grade your website's performance.

Core Web Vitals Grader is a high-performance utility designed to help users streamline their workflow. Built with modern web technologies, it ensures fast processing times and high-quality outputs directly in your browser.

settingsTechnical Specs

Platform: Web-based (Universal)
Privacy: 100% Client-side
License: Free / No Sign-up
Resolution: High-Res (300DPI ready)
Formats: PNG, JPG, WEBP

verifiedCore Capabilities

check_circleInstant browser rendering
check_circleBatch image management
check_circleUndo/Redo history stack
check_circleHardware accelerated canvas
check_circleZero server-side data logs

settingsHow it Works

Data is retrieved from the Google PageSpeed Insights API. The tool evaluates field and lab data for Core Web Vitals (LCP, FID, CLS) and categorizes performance as Good, Needs Improvement, or Poor based on Google's official thresholds.

quizFrequently Asked Questions

What is a good LCP?

Largest Contentful Paint should occur within 2.5 seconds of when the page first starts loading.

Core Web Vitals Grader