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.

Hi Product Hunt! 👋 I'm the maker of ScreenSize.net. I built this tool because I kept finding myself needing to quickly check viewport dimensions while developing responsive websites. Why not just use DevTools? • Sometimes you want a quick glance without disrupting your workflow • Works great on mobile devices (no mobile DevTools) • Easy to share exact specs with designers and clients • Real-time updates as you resize The site is built with: • Astro + TypeScript for performance • Cloudflare Pages for global edge delivery • Zero tracking or analytics It's completely free and always will be. I'd love to hear your feedback! What other features would make this more useful for your workflow? Thanks for checking it out! 🙏

ScreenSize.net

Live screen checker for responsive web development

Live screen checker for responsive web development