Why does the reported screen size differ from the physical monitor?

Operating-system scaling, browser zoom, and multi-monitor arrangements can affect the values reported by screen.width and screen.height.

What is devicePixelRatio?

It is the ratio between CSS pixels and physical device pixels. Many Retina displays report a value of 2.

Can this tool detect bots?

No. It only displays environment information provided by the browser and cannot reliably determine whether a visitor is automated.

Screen and Browser Information

View the browser's visible area, screen resolution, device pixel ratio, language, time zone, and User-Agent information to help investigate display issues.

Files and content are processed locally in your browser and are not uploaded to our server.

About this tool

View information provided by the browser about the screen and current environment, including the visible browser area, inner and outer window dimensions, screen resolution, devicePixelRatio, color-scheme preference, language, time zone, and User-Agent. These details can help reproduce display problems and choose suitable image export sizes.

How to use

Visible browser area and screen dimensions
Device pixel ratio (DPR)
Color-scheme preference reported by prefers-color-scheme
Browser language and time zone
Copy all information as text
View the current information: Open the tool to display the information currently provided by the browser.
Resize and update: Resize the window or rotate the device, then refresh the displayed information.
Copy the report: Paste the report into a support request or send it to a team member.

Examples

Record the visible browser area when reporting a display problem
Choose suitable image dimensions for high-density displays based on DPR
Check language and regional settings while reviewing translations
Compare User-Agent information between a mobile device and desktop emulation

Limitations

Values are reported by browser APIs and are not guaranteed hardware specifications
Privacy-focused browsers may shorten or modify User-Agent information
The displayed information is read directly from your browser and is not sent to a server for processing.

FAQ

Why does the reported screen size differ from the physical monitor?: Operating-system scaling, browser zoom, and multi-monitor arrangements can affect the values reported by screen.width and screen.height.
What is devicePixelRatio?: It is the ratio between CSS pixels and physical device pixels. Many Retina displays report a value of 2.
Can this tool detect bots?: No. It only displays environment information provided by the browser and cannot reliably determine whether a visitor is automated.