Frequently Asked Questions

It reads the display information your browser reports — screen.width, screen.height, window.innerWidth, window.devicePixelRatio, and related APIs — and shows it instantly. No input or downloads are needed.

Completely free. No sign-up, no downloads, no limits.

Screen resolution is the total size of your display as the browser sees it. The browser viewport is just the visible area of the web page inside your window, which is usually smaller because the browser's own UI (tabs, address bar) takes up space.

Device pixel ratio tells you how many physical (hardware) pixels map to one CSS pixel. On standard displays it's 1. On high-density (Retina or HiDPI) screens it's typically 2 or higher, which makes text and images look sharper.

Browsers report sizes in CSS pixels, not raw panel pixels. OS display scaling (e.g. 150% on Windows, 2× on Mac Retina) means the CSS pixel count is divided down from the hardware resolution. The "Actual Pixels" row multiplies the viewport by DPR to show the physical pixel count your browser uses.

Yes. The tool listens for window resize and orientationchange events, so all values update live the moment your window size or device orientation changes.

It shows browser viewport size, actual physical pixels (viewport × DPR), device pixel ratio, color depth (bits per pixel), orientation (portrait or landscape), screen aspect ratio (e.g. 16:9), and available screen area — the usable area excluding the OS taskbar.

Yes. Click the "Copy all" button to copy every detected value to your clipboard in a clean, labelled format — ready to paste into a document or share.

No. Everything is detected and displayed locally in your browser using JavaScript browser APIs. Nothing is stored, logged, or sent anywhere.

Yes. The tool is fully responsive and detects your mobile device's values — screen size, viewport, DPR, and orientation — without any overflow or layout issues.