Screen Size Checker

Live browser and screen metrics. Updates on resize.

Live — resize the window to update

Viewport Width

—

CSS pixels (window.innerWidth)

Viewport Height

—

CSS pixels (window.innerHeight)

Screen Width

—

Physical screen (screen.width)

Screen Height

—

Physical screen (screen.height)

Device Pixel Ratio

—

Physical px per CSS px

Color Depth

—

Bits per pixel

Orientation

—

Portrait or Landscape

Device Type

Based on screen width & user agent

About this tool

Screen Size Checker

See your browser viewport, screen resolution, device pixel ratio, and orientation in real time. Free online tool.

Screen Size Checker is a free browser-based tool from South Fork Apps. There's nothing to install, no account to create, and no usage limit. Open the page, do the work, and move on.

How it works

Open Screen Size Checker in any modern browser on desktop or mobile.
Enter or paste your input into the tool's main field.
Adjust any options shown on the page to match what you need.
Copy or download the result and continue with your work.

Why use a browser tool

Browser tools beat installable apps when the job is small. You don't have to manage updates, sign in, or wait for a heavy program to load. Screen Size Checker runs entirely in your browser. Your input never leaves your device, no analytics watch what you type, and the page stops working the moment you close the tab.

Privacy and data

South Fork Apps tools process everything client-side in JavaScript. No server sees your data. Nothing is stored, logged, or sent anywhere. If you're working with sensitive content, you can verify by opening the page once, disconnecting from the internet, and watching Screen Size Checker keep working.

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