About ScreenInspector

Welcome to ScreenInspector.com — a free, browser-based suite of display diagnostic tools built to help everyday users, web developers, and gamers understand exactly what their screen is doing.

Our mission is simple: make screen diagnostics instant, accurate, and easy to understand for everyone.

Our Tools

ScreenInspector offers seven free diagnostic tools, all running entirely in your browser with no data ever sent to our servers:

• Screen Resolution Checker — Detect your monitor's exact physical and logical resolution, accounting for OS display scaling.
• Viewport Size Checker — Measure your browser window's live CSS dimensions, essential for responsive design testing.
• PPI Calculator — Calculate your screen's pixel density in Pixels Per Inch (PPI) based on resolution and physical screen size.
• Aspect Ratio Calculator — Find your display's exact aspect ratio (16:9, 21:9, etc.) and calculate proportional scaling.
• Refresh Rate Checker — Measure your monitor's actual active refresh rate in Hertz (Hz) and frames per second using the browser's animation API.
• Dead Pixel Tester — Scan your display with full-screen solid color fills to identify dead or stuck pixels and backlight bleed.
• System Info — View your browser fingerprint, OS details, CPU cores, memory, and network connection type.

Why Use ScreenInspector?

• 100% Private: All diagnostics run client-side in your browser. We never collect or transmit your screen data.
• No Downloads: Fully browser-based — nothing to install or configure.
• Works Everywhere: Compatible with Chrome, Firefox, Safari, and Edge on desktop, tablet, and mobile.
• Easy to Understand: Clear explanations of every metric — no confusing jargon.

Contact Us

Have feedback, found a bug, or want to suggest a new tool? We'd love to hear from you at support@screeninspector.com.