Screen Resolution Checker

Fast, accurate, and free online Screen Resolution Checker tool that runs directly in your browser.

Secure (SSL)

Client-Side Processing

100% Free

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Instructions

1

Enter data
Enter content, paste text or load a file from disk.
2

Click the button
The tool will immediately process your data in the browser.
3

Get the result
Copy the finished text or save the file to your device.

                                                function runTool() {

                                                  return "Result ready in 0.1s";

                                                }

Check Screen Resolution

Professional diagnostics of the display and browser parameters in real time.

Live Mode Active

Your screen resolution

0 × 0

Viewport: 0 × 0

Ratio (DPR) 1.0

Orientation -

Color depth -

Language -

Advanced statistics

Proportions (Ratio) -

Touch points -

HDR support -

Color gamut -

System theme -

Available space

0 × 0 px

Area without taskbars and system menus.

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Check the screen resolution - you immediately know what your browser sees

There are two resolutions that people get confused all the time:screen(the physical grid of pixels) andviewport(how much space the page has in the browser window). This tool shows both values live, plus a few "tastes" such as DPR, proportions, orientation, color depth and a few things that will be useful in tests or remote assistance.

free online without registration live score screen + viewport DPR / ratio / HDR

If someone has ever told you "my resolution is 1920×1080" and you still saw the page break like an accordion - it was probably becauseviewport, not the screen resolution. In practice: it is the viewport that decides how the layout really behaves.

What exactly will this resolution test show you?

The result is clear at first glance: the large counter showsyour screen resolution, and below it isViewport- the "working space" of the browser. Additionally, you get a set of parameters that usually have to be extracted from DevTools or guessed:DPR(devicePixelRatio),orientation, color depth, browser language, and in the "advanced statistics" also aspect ratio, number of touch points, HDR support, color gamut and theme preference.

Screen

This is "hard" information about how many pixels the screen has in the X and Y axes. It is useful when diagnosing: a monitor, laptop, TV, scaling settings or whether someone is working on an external screen. In short: this is themaximumthat the device can display.

Viewport

This is the most important number for the web. Viewport tells you how much space a page actually has at a given moment, after subtracting the browser UI, bars, sidebar, zoom, and sometimes even system elements. It is the viewport that determines breakpoints in CSS and when the layout "jumps".

Why can the "available space" be smaller than the screen?

The "available space" parameter shows the area that remains after subtracting the system elements: taskbar, dock, menu. This is one of those details that saves time when someone says: "I have 2560×1440" and you see that the application in full screen mode does not fit the side panel anyway. For diagnostics of workstations (home office, ultra-widescreen monitors, docking stations) it is gold.

These parameters make a difference in practice

The pixel numbers themselves are nice, but it's the additions that explain "why it looks different." Below is a quick map of what's what - no technical jargon, just what actually helps.

DPR

Device Pixel Ratiotells whether "1 px in CSS" is actually 1 physical pixel. On HiDPI screens (e.g. Mac, many phones) the DPR may be 2 or 3 - and then graphics and thin lines may behave differently.

RATIO

Screen aspect ratio(e.g. 16:9, 21:9) are crucial in videos, games, dashboards and presentations. You design a video panel for 21:9 differently than for 4:3.

HDR

HDRcan be important in testing video and photo materials. If someone reports "washed colors" or "too dark", this parameter will quickly tell you whether the device supports wide dynamic range at all.

GAMUT

Thecolor gamut (e.g. sRGB / P3) affects