Screen Resolution Simulator

The Screen Resolution Simulator lets you preview any website at different screen sizes for free, so you can check that your responsive design looks right on phones, tablets and desktops.

Why simulate screen sizes?

Visitors arrive on countless device sizes. Simulating resolutions helps you catch layout issues — overflowing text, broken grids, tiny tap targets — before users do, without owning every device.

How to use the Screen Resolution Simulator

1. Enter the website URL.
2. Choose a screen resolution or device.
3. Preview how the site renders at that size.

Key features

• Free responsive preview
• Common device and screen sizes
• Catch layout issues early
• No sign-up required

Related tools

What Is My Screen Resolution · What Is My Browser · Page Size Checker

Frequently asked questions

Is the Screen Resolution Simulator free?

Yes, it is completely free.

Which sizes can I test?

Common phone, tablet and desktop resolutions.

Does it replace real-device testing?

It catches most issues, but test on real devices for final checks.

Can I preview any site?

Yes, for any public website that allows framing.