Website Speed & Core Web Vitals Tools
Core Web Vitals (LCP, INP, CLS), TTFB, minifiers, preloading, and caching generators.
All Website Speed & Core Web Vitals Utilities (20)
Browse Full A–Z Index →Core Web Vitals Checker
Audit Google Core Web Vitals (LCP, INP, CLS) performance.
Launch Tool →LCP Optimizer
Diagnose and optimize Largest Contentful Paint hero assets.
Launch Tool →INP Interaction Checker
Evaluate page responsiveness and main-thread JavaScript delays.
Launch Tool →CLS Layout Shift Calculator
Calculate visual layout shifts and eliminate jumping content.
Launch Tool →TTFB Optimizer
Audit DNS lookup, TLS handshake, and server response times.
Launch Tool →FCP Speed Tester
Audit render-blocking stylesheets delaying initial paint.
Launch Tool →Gzip & Brotli Compression Checker
Test Gzip and Brotli compression bandwidth savings.
Launch Tool →Browser Caching Header Generator
Generate Cache-Control and Expires headers for static assets.
Launch Tool →Image Compression Calculator
Estimate payload reductions achieved with WebP and AVIF.
Launch Tool →Lazy-Load Tag Generator
Generate native loading=lazy and decoding=async HTML attributes.
Launch Tool →CSS Minifier Tool
Minify CSS code in real time by removing whitespace and comments.
Launch Tool →JavaScript Minifier Tool
Compact JavaScript code for faster script parsing and execution.
Launch Tool →HTML Minifier Tool
Compress HTML markup and strip redundant comments.
Launch Tool →Resource Preload Generator
Generate preload and preconnect tags for critical fonts and images.
Launch Tool →Font Display Swap Optimizer
Generate font-display: swap rules to prevent invisible text.
Launch Tool →DOM Size Analyzer
Audit total DOM elements and node depth to prevent memory lag.
Launch Tool →CDN Speed Benefit Estimator
Estimate global latency reductions with Cloudflare/CloudFront.
Launch Tool →Critical CSS Extractor
Extract critical above-the-fold CSS styles for inline insertion.
Launch Tool →Payload Budget Calculator
Calculate total page weight budget across JS, CSS, and images.
Launch Tool →HTTP/2 & HTTP/3 Protocol Checker
Audit server support for HTTP/2 multiplexing and HTTP/3 QUIC.
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