# Screen resolution checker

> Instantly see your screen resolution, physical pixels, device pixel ratio, browser viewport, colour depth and orientation. Updates live as you resize.

Your display’s resolution, scaling and browser viewport, measured the moment this page loads and updated live as you resize or zoom.

Web page: https://screenbadger.com/tools/screen-resolution-checker

The tool runs entirely in your browser, and nothing is uploaded. Open the web page above to use it.

## Why use this screen resolution checker?

### Answers in one glance

No settings menus to dig through. Open the page and your resolution is right there.

### Understand scaling

See both the CSS size websites use and the physical pixels your display really has, plus the pixel ratio between them.

### Useful for support and design

Copy every value in one click to share in a bug report or to check a layout breakpoint.

### Nothing to upload

All values are read directly by your browser. Nothing is sent anywhere or stored.

## How to use the screen resolution checker

1. Open this page. Your details appear straight away.
2. Resize the window or zoom to see the values update.
3. Press Copy details to share them.

## Screen resolution vs viewport

Screen resolution is the size of your whole display, while the viewport is the part of the browser window a web page can use. Operating systems scale high-density displays, so a 2880 × 1800 screen may report as 1440 × 900 with a device pixel ratio of 2. Taking screenshots? ScreenBadger saves them at full resolution, with no watermark.

## Frequently asked questions

### Why is my resolution smaller than my monitor’s spec?

Your operating system is scaling the display. Browsers report scaled CSS pixels; multiply by the device pixel ratio to get the physical pixels shown as the headline.

### Does browser zoom change the numbers?

Yes. Zooming changes the device pixel ratio and viewport, so the CSS screen size can change too. Reset zoom to 100% for your true scaling.

### What is colour depth?

The number of bits used for each pixel’s colour. Most displays report 24-bit, which is 8 bits per red, green and blue channel; HDR displays may report 30-bit.

### What does available screen mean?

It is the screen area left after permanent system UI such as the taskbar or Dock.

## Related

- [Webcam test](https://screenbadger.com/tools/webcam-test): Check your camera’s live preview, resolution and frame rate.
- [Full page screenshot](https://screenbadger.com/full-page-screenshot-chrome): Capture an entire scrolling page in Chrome, then annotate and download it.
- [Screenshot tool](https://screenbadger.com/features/screenshot-tool): Capture a visible area, region, or full page, then annotate it and copy, download, or share it.

Last updated: 2026-10-15