Performance

HTTP Cache and Compression Analyzer Inspect Cache-Control, validators, Vary, Age, Content-Encoding and observed CDN or cache headers from one bounded public fetch. Lightweight Website Speed Test Measure one server-side HTTP request, including timing, status and main-response size, without presenting it as Lighthouse or Core Web Vitals. Responsive Viewport Planner Prepare a practical set of viewport sizes and a manual responsive-testing checklist without pretending to emulate a specific device. HTML Page Size Checker Measure the downloaded HTML response size and key HTTP metadata while keeping subresources and browser transfer size clearly separate. Server Status Checker Make a bounded, one-time HTTP check for status, redirects and response timing without presenting it as continuous uptime monitoring. Technical Performance Audit Measure the server response and HTML size, then inspect compression, caching and statically visible scripts, styles, images and fonts without an external API.