ArchSetuCore Web Vitals Checker
LCP, INP, and CLS checked against Google's published thresholds - INP, not the retired FID metric.
Google's published Core Web Vitals thresholds - INP, not FID, since INP became the official responsiveness metric in March 2024.
Was this tool helpful?
See this same kind of analysis applied to your whole repository
Call graphs, dead code, blast radius, and a health score. Results in 60 seconds, free.
Related tools
See all Frontend tools →Bundle Size Budget Calculator
Bundle size, connection speed, and target load time - is your JS bundle within budget.
CSS Specificity Calculator
Paste a CSS selector - IDs, classes, and elements broken down, plus the specificity score.
Color Contrast Checker
Two colors to the exact WCAG contrast ratio, and whether it passes AA and AAA.
React useEffect Dependency Checker
Paste a useEffect/useMemo/useCallback call - identifiers used vs declared deps, mismatches flagged.
Browser Bookmarklet Generator
A small safe preset list, turned into a draggable javascript: bookmarklet.
Runs entirely in your browser. Nothing is stored. Free forever.
Powered by ArchSetu