What Is My Screen Resolution
Check resolution, refresh rate, pixels, colors & recording — all in one place.
Your Screen Resolution is
—×—
Measurements are in pixels (px). ——
Dead pixel inspection visual only
Displays uniform full-area colors so you can visually inspect for stuck or dead pixels. This tool cannot automatically detect or count defective pixels.
Enter a valid HEX like #FFFFFF or #FFF.
RGB(255, 255, 255)
Keys: →/Space next · ← previous · F fullscreen · Esc exit
Refresh rate estimator
Observed frame rate
Idle — press Start Measurement.
Frame timing
| Avg interval | — |
|---|---|
| Median interval | — |
| Samples | 0 |
| History | none yet |
Estimated FPS = 1000 ÷ avg interval (ms). Browser scheduling, power saving, background throttling and VRR can make this differ from the monitor's physical refresh rate.
Screen recorder
Preview
Idle · 00:00 · mime: auto
Controls
Uses getDisplayMedia + MediaRecorder after your explicit click. Your browser will ask which screen, window or tab to share. Nothing is uploaded.
Resolution visualization & compare
Detailed information
Screen
Viewport & device
Settings
| Theme | |
|---|---|
| Default auto-cycle | |
| Cycle interval | |
| Fullscreen confirmation |
Harmless preferences are stored in localStorage when available. The app works fully without it.
About this tool
WhatScreen measures what your browser reports: screen.* dimensions, viewport size, devicePixelRatio, color depth, orientation, touch points and (where supported) multi-display status. Browser values are CSS pixels, not guaranteed native hardware pixels. DPR-based physical estimates are approximations. Frame-rate readings are affected by scheduling, power saving, background throttling and variable refresh rate. Touch and multi-display APIs report browser capability, not a hardware guarantee. All processing happens locally in your browser — no screen details or recordings are uploaded to any server.
Privacy: clipboard, fullscreen, display-capture and storage APIs are only used after your explicit action, with full browser permission prompts.
Trusted by Creators, Developers & Digital Teams
A convenient way to check screen resolution, browser viewport, and display details for everyday digital work.
What Is My Screen Resolution and What Does It Mean?
Screen resolution refers to the number of pixels arranged horizontally and vertically across a display. A resolution such as 1920 × 1080 describes a display format with 1,920 pixels across and 1,080 pixels vertically.
Understanding your resolution can help you make sense of image clarity, available screen space, and how content appears on different devices.
Whats My Reso makes it easy to view screen dimensions reported by your browser without searching through operating-system settings.
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Read browser-reported values
Values come directly from your browser, not from guessing.
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Compare screen and viewport
See both your display size and the space available inside the browser.
Conceptual illustration, not a real measurement of this device.
Understand Your Screen Resolution and Display Details
Screen resolution is only one part of your display information. Explore the measurements that affect how websites and digital content appear.
Screen Resolution
The width and height of your screen in pixels, as reported by your browser.
Browser Viewport
The visible content area inside your browser window.
Device Pixel Ratio
The relationship between physical display pixels and CSS pixels.
Screen Orientation
Understand whether your screen is currently in portrait or landscape mode.
Color Depth
View information about the number of bits used to represent display colors.
Available Screen Size
Check the screen space available to applications after certain system interface areas are excluded.
How to Check Your Screen Resolution Online
Find your screen dimensions in three simple steps.
Open Whats My Reso
Visit the website using your preferred browser on a desktop, laptop, tablet, or smartphone.
View Your Screen Details
The existing tool automatically displays the supported screen and browser information.
Copy Your Results
Use the tool’s copy feature to save your screen dimensions for reference or comparison.
A Smarter Way to Check Your Display Information
Everything you need to understand your screen dimensions, presented in one simple browser-based tool.
Instant Detection
Check supported screen details without navigating through complicated settings.
Completely Free
Use the resolution checker without subscriptions or hidden charges.
Works Across Devices
Access the tool using modern desktop, tablet, and smartphone browsers.
No Installation Required
Check your display information without downloading additional software.
Live Viewport Information
See viewport dimensions update when resizing your browser window.
Easy Copy Functionality
Copy supported resolution values quickly for reference or sharing.
Common Screen Resolutions Explained
Compare common display formats and understand the differences between familiar screen resolution sizes.
| Resolution | Common Name | Typical Use |
|---|---|---|
| 1280 × 720 | HD | Video and older displays |
| 1366 × 768 | WXGA | Laptop displays |
| 1920 × 1080 | Full HD | Monitors, laptops, televisions |
| 2560 × 1440 | QHD | High-resolution monitors |
| 3840 × 2160 | 4K UHD | Ultra-high-definition displays |
| 7680 × 4320 | 8K UHD | Very high-resolution displays |
These are standard resolution examples and are not necessarily the browser viewport dimensions. Operating-system scaling and device pixel ratio may affect browser-reported values.
Why Your Screen Resolution Matters
From responsive websites to digital content and gaming, display dimensions influence how you work and interact with technology.
For Web Developers
Understand screen and viewport dimensions when testing responsive layouts.
For UI/UX Designers
Use screen measurements to inform layout decisions and digital interface design.
For Gamers
Understand display resolution options and their relationship to visual clarity and performance.
For Everyday Users
Check device dimensions and compare common display formats.
What Users Say About Whats My Reso
Practical feedback from people who use screen and viewport details in their daily work.
“I use it whenever I’m checking a layout at a new breakpoint. Having the screen, viewport, and pixel ratio in one place saves me from jumping between browser tools and system settings.”
Alex Morgan
“It’s refreshingly straightforward. I can quickly confirm the viewport I’m designing for and share the details with the rest of the team without any extra steps.”
Priya Nair
“When I’m documenting a browser issue, getting the display information takes seconds. The clear breakdown makes it much easier to include the right context in a bug report.”
Jordan Reyes
Latest From Our Blog
Read helpful articles about screen resolution, browser dimensions, display settings, and responsive website design.
Frequently Asked Questions About Screen Resolution
Find quick answers to common questions about screen dimensions, browser viewport sizes, and display settings.
Your screen resolution refers to the pixel dimensions of your display. Whats My Reso shows the screen dimensions reported by your browser so you can quickly check your display information.
Open Whats My Reso in your browser. The tool automatically detects and displays supported screen information without requiring an installation.
No. Screen resolution describes display dimensions, while viewport size refers to the area available for webpage content inside the browser window.
Operating-system scaling, device pixel ratio, and browser reporting can produce values that differ from your monitor’s physical pixel resolution.
Resizing your browser typically changes the viewport dimensions rather than the underlying display resolution.
The ideal resolution depends on your device and needs. Full HD is common for general use, while QHD and 4K can provide additional detail on suitable displays.
Yes. Compatible mobile browsers can report screen dimensions, although these values may differ from the device’s physical display pixel count.
Yes. Whats My Reso provides free access to its supported screen resolution and display information features without requiring account registration.
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