Screen Resolution
Screen Resolution Checker
See your screen resolution, viewport size, device pixel ratio, and orientation — updated live as you resize the window.
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How to use it
- Open this page. Values populate automatically.
- Resize your browser window or rotate your device to see values update.
- Copy the report to paste into a bug report or support ticket.
Examples
Bug report
Include the copy-pasted report so a developer can reproduce your layout.
Design QA
Confirm the viewport size that matches a Figma frame.
HiDPI check
A DPR of 2 or 3 means you're on a Retina/high-density display.
About this tool
All values come straight from standard browser APIs — window.innerWidth, window.screen, devicePixelRatio, and matchMedia. The tool never asks for permission and never contacts a server.
FAQ
- What is my screen resolution?
- Your screen resolution is the number of physical pixels your display can show. This tool reports it from screen.width × screen.height, refreshed live in your browser.
- Why is my viewport smaller than my screen?
- The viewport is the area inside the browser window. It's smaller because of the address bar, docks, tabs, and any window chrome. Fullscreen a maximized window and the two get closer.
- What is devicePixelRatio?
- It's how many physical pixels correspond to one CSS pixel. A HiDPI/Retina screen typically reports 2 or higher, so a 1920×1080 viewport actually renders at 3840×2160 pixels.
- Why does the resolution seem lower than the box says?
- The OS applies scaling (e.g. 150%) which the browser reports as a smaller logical resolution. The physical pixels are recovered by multiplying by devicePixelRatio.
- Is anything sent to a server?
- No. Every value is read locally with the standard browser APIs (window, screen, matchMedia). Nothing leaves your device.
Privacy
Everything runs locally in your browser. Your input is never uploaded, logged, or stored.