What Is My Screen Resolution

The What Is My Screen Resolution tool instantly shows your display resolution and browser viewport size in pixels for free — useful for design, support and troubleshooting.

Why check your screen resolution?

Knowing your exact screen and viewport size helps with responsive design testing, sharing details with support, and understanding how pages render on your device. This tool reads and displays it in one glance.

How to use the What Is My Screen Resolution

1. Open the tool.
2. It reads your screen and viewport size.
3. Read or copy the resolution values.

Key features

• Free, instant detection
• Shows screen and viewport size
• Handy for design and support
• No sign-up required

Related tools

Screen Resolution Simulator · What Is My Browser · What Is My User Agent

Frequently asked questions

Is this tool free?

Yes, it is completely free.

What is the difference between screen and viewport?

Screen is your full display; viewport is the visible page area in the browser.

Is my data sent anywhere?

No, detection happens in your browser.

Why does resolution matter?

It affects how responsive layouts render on your device.