Everything You Need to Understand Your Screen
From screen resolution and browser viewport dimensions to device pixel ratio and orientation, Whats My Reso brings useful display information together in one convenient browser-based tool.
Check your screen details instantly and understand what those measurements mean.
- Free Online Tool
- No Installation Required
- Works Across Devices
Get a Clearer Picture of Your Screen
Explore the essential display information available through Whats My Reso, organized to help you understand your device without unnecessary complexity.
Screen Resolution Detection
Check the width and height of your screen as reported by your browser and compare familiar display formats.
Browser Viewport Dimensions
Understand the available width and height of the browser content area for responsive layouts.
Device Pixel Ratio
View the browser-reported relationship between physical display pixels and CSS pixels.
Screen Orientation Detection
Identify whether your supported device is currently using portrait or landscape orientation.
Screen Color Depth
View color-depth information exposed by your browser and its role in digital color representation.
Available Screen Dimensions
See screen space reported as available to applications, excluding certain system interface areas.
Know Your Screen Dimensions in Seconds
Screen resolution describes the number of pixels arranged horizontally and vertically across a display. Whats My Reso helps you check the dimensions your browser reports.
- View screen width and height
- Understand pixel dimensions
- Compare common resolution formats
- Access information directly in your browser
1536 × 864
Understand the Space Your Browser Actually Uses
Your browser viewport is the area available for webpage content. It can be smaller than screen dimensions because of browser interface, window size, and other factors.
Responsive Layout TestingUnderstand how content space changes with browser window sizes.
Design PrecisionMake better-informed responsive design decisions.
Clearer Screen ComparisonsSeparate display dimensions from webpage display space.
Understand Device Pixel Ratio and Display Scaling
Device Pixel Ratio, or DPR, describes the relationship between physical display pixels and CSS pixels reported by your browser.
1 CSS Pixel
A logical unit used when rendering web layouts.
4 Physical Pixels
For DPR 2, one CSS pixel commonly maps to a 2 × 2 physical pixel area.
More Details About Your Display
Screen information goes beyond width and height. Browser-reported measurements help explain your display environment.
Screen Orientation
See whether your current screen orientation is portrait or landscape.
LandscapeColor Depth
Understand browser-reported color-depth information associated with your display.
Available Screen Area
See dimensions reported as available after certain interface areas are excluded.
Available areaPowerful Screen Information, Without the Complexity
Whats My Reso is designed to make checking display information quick, straightforward, and accessible.
Instant Information
View supported measurements without complicated setup.
Completely Free
Check screen information without subscription fees.
No Account Needed
Use the checker without creating an account.
No Software Installation
Access the tool through a compatible browser.
Responsive Interface
Use it comfortably across desktop and mobile devices.
Simple Results
See information in an organized, readable format.
Useful Display Insights for Every Kind of User
From building responsive websites to understanding your own device, screen information supports a wide range of tasks.
For Web Developers
Check viewport sizes and screen dimensions while working on responsive websites.
For UI/UX Designers
Understand measurements relevant to interface layouts and design decisions.
For Gamers
Understand resolution and its relationship to visual clarity and performance settings.
For Everyday Users
Check screen dimensions quickly without navigating complicated settings.
Compare Common Screen Resolution Formats
Understand familiar resolution formats and how they are commonly used across different displays.
| Resolution | Name | Common Context |
|---|---|---|
| 1280 × 720 | HD | Video and older displays |
| 1366 × 768 | WXGA | Laptop displays |
| 1920 × 1080 | Full HD | Monitors and laptops |
| 2560 × 1440 | QHD | Higher-resolution monitors |
| 3840 × 2160 | 4K UHD | Ultra-high-definition displays |
| 7680 × 4320 | 8K UHD | Very high-resolution displays |
These formats represent familiar physical display pixel dimensions. Browser-reported screen sizes may differ because of scaling and browser behavior.
Check Your Screen Resolution in Three Simple Steps
Get display information directly from your browser without installing additional software.
Open the Website
Visit Whats My Reso using a compatible desktop or mobile browser.
View Your Screen Information
The tool presents supported browser-reported measurements.
Copy or Compare Your Results
Review your information and use the available copy feature when needed.
Frequently Asked Questions About Our Features
Find answers to common questions about screen resolution detection, viewport dimensions, and display information.
Whats My Reso helps visitors check browser-reported screen dimensions and related display information, including viewport size, device pixel ratio, orientation, color depth, and available screen area where supported.
The tool primarily uses browser-reported measurements, which can differ from physical pixel counts because of scaling, device pixel ratio, and browser behavior.
Screen resolution describes display dimensions, while viewport size is the area available for webpage content inside the browser window.
Device Pixel Ratio describes the relationship between physical display pixels and CSS pixels as reported by the browser.
Compatible browsers can provide information indicating whether the display is currently in portrait or landscape orientation.
Yes. The website is intended to work on compatible mobile and tablet browsers, although available measurements may vary.
No. Whats My Reso is a browser-based utility and does not require additional software.
Yes. The screen resolution checker is available free without a subscription or account registration.
Ready to Understand Your Screen Better?
Check your screen resolution, viewport dimensions, and other supported display details with our free online checker.