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Device Pixel Ratio & Screen Info

Everything this browser is willing to tell you about the display you are looking at: pixel ratio, screen and window sizes, viewport maths, colour depth, orientation, input capabilities, CSS media preferences and image-format support. Values are read after the page loads, so nothing is guessed during rendering.

CSS pixels, device pixels and DPR

One CSS pixel is a layout unit, not a hardware dot. The browser paints it with DPR × DPR device pixels, which is why a high-DPR screen looks sharp while the layout maths stays the same.

reading this device…

Image format support

Probed with a 2×2 canvas: the canvas tries to encode the format, then the result is decoded back through an Image. If the browser exposes the newer ImageDecoder API, that is asked first because it reports true decode support.

  • probing…

JPEG XL is reported conservatively: no browser can encode JXL from a canvas, so where ImageDecoder is missing this test says “not supported” even in a browser that can display JXL files.

Reading your display information…

About this tool

Device Pixel Ratio & Screen Info reports the real values your browser exposes — pixel ratio, screen and window geometry, colour depth, orientation, pointer and touch capability, platform hints, CSS media preferences and image-format support. Every value is read inside an effect (never during rendering) and refreshed on resize, rotation and media preference changes; anything a browser hides, such as device memory in Firefox, is shown as “your browser does not expose this” rather than guessed. Nothing is sent anywhere.

  • 100% free — no account needed
  • Runs in your browser
  • Nothing is uploaded

Frequently asked questions

Is Device Pixel Ratio & Screen Info really free?

Yes. Device Pixel Ratio & Screen Info is completely free on PureBrowser — every feature, with no account, no trial, and no credit card.

Does Device Pixel Ratio & Screen Info upload my data?

No. Device Pixel Ratio & Screen Info runs entirely inside your browser, so anything you type, paste, or open stays on your own device.

Do I need to sign up or install anything?

Neither. There is no account and nothing to download — open the page and Device Pixel Ratio & Screen Info is ready to use on desktop or mobile.

Does Device Pixel Ratio & Screen Info work offline?

Once the page has loaded, yes. All of the processing happens locally in your browser, so it keeps working without a connection.

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