The free What Is My Screen Resolution & Device Info
Instantly see your screen resolution, real physical pixels, viewport size, device pixel ratio, browser, operating system, CPU cores, GPU and more.
- Free to use
- No signup
- Nothing to install
- Runs in your browser
Screen 1440 × 900 (CSS) · pixel ratio 2 → physical 2880 × 1800 (QHD+) on a 13-inch Retina laptop Viewport 1280 × 720 while the browser window is not maximisedOpen the What Is My Screen Resolution & Device Info
Illustration. Open the tool for the real thing.
What is the What Is My Screen Resolution & Device Info?
Your screen resolution is the number of pixels your display shows, written as width × height, for example 1920 × 1080. This page reads it straight from your device and shows three different numbers people often confuse: the CSS resolution your browser reports, the real physical resolution of the panel, and the size of the browser window (the viewport) you are looking at right now.
It also lists the device pixel ratio (how many physical pixels make one CSS pixel on Retina and high-DPI screens), colour depth, orientation, HDR and wide-colour support, your browser and operating system, CPU cores, memory, graphics card, language, time zone and connection type. Web designers use it to test responsive layouts, gamers to confirm their settings, and support teams to ask for exact details — one click copies everything as text.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
Shows the real panel resolution and the scaled resolution your browser uses.
Resize the window and watch the width and height update instantly.
Browser version, operating system, GPU, CPU cores and memory when reported.
Export the full report as text for support tickets or bug reports.
AZRS tools are free to open and use.
It opens in your browser, so there is nothing to download.
Used for
Pick one to see how it fits.
Web designers and developers
Test breakpoints, retina images and responsive layouts on real devices.
Try it freeIT support
Collect exact browser, OS and screen details from a customer in one paste.
Try it freeHow it compares
A plain look at this tool next to the usual alternative.
| This utility | Desktop software | |
|---|---|---|
| Install | Nothing to install | Usually an app or program to install |
| Account | No signup | Depends on the product |
| Cost | Free to use | Free or paid, depends on the product |
| Where it runs | In your browser tab | On your computer |
Questions people ask
What is my screen resolution?
It is shown at the top of this page as width × height. The larger card shows the real physical resolution of your display.
Why is my resolution different from what I set?
Operating-system scaling changes what the browser sees. A 3840 × 2160 display at 200% scaling appears to websites as 1920 × 1080 CSS pixels, with a device pixel ratio of 2.
What is the viewport?
The viewport is the visible area inside the browser window where the page is drawn. It changes when you resize the window, zoom or rotate a phone.
What is device pixel ratio?
How many physical screen pixels are used for one CSS pixel. Standard screens are 1, Retina and most phones are 2 or 3.
Is my information sent anywhere?
No. Everything is read from your browser on your own device and is never uploaded or stored.
More free tools
Related to the What Is My Screen Resolution & Device Info.
Try the What Is My Screen Resolution & Device Info now
See your screen resolution, window size, pixel ratio, browser, OS and GPU. Free to use.
Try it free