ScreenSize.net is a live screen checker that shows your current viewport dimensions, screen resolution, device pixel ratio, and other specs in real-time — no DevTools needed. Perfect for: • Testing responsive breakpoints as you resize • Sharing exact screen specs with clients or designers • Quick reference on mobile devices (where DevTools isn't available) • Comparing your screen with target devices (iPhone, iPad, MacBook, etc.) Built with Astro + TypeScript, deplolazing-fast global performance.