Web Vitals Simulator
Estimate Core Web Vitals scores
LCP
Largest Contentful Paint measures loading performance. Target: < 2.5s
Target: < 2.5s
FID
First Input Delay measures interactivity. Target: < 100ms
Target: < 100ms
CLS
Cumulative Layout Shift measures visual stability. Target: < 0.1
Target: < 0.1
Related Tools
WYSIWYG EditorVisual HTML editor with live source
Performance BenchmarkCompare JS code snippet speeds
Media Query GeneratorGenerate responsive CSS breakpoints
Data URI MakerConvert files to Base64 Data URIs for CSS
JSON to SQL SchemaInferred SQL table definitions from JSON
JS Console PrettifierVisual debugger for complex JS objects