Screen Resolution Simulator
Preview how your website looks across different screen sizes and devices
With visitors accessing websites from hundreds of different device screen sizes — from small smartphone screens to large 4K monitors — ensuring your site renders correctly across all of them is a core requirement of modern web design and technical SEO. A page that looks perfect on a desktop may have broken layouts, overflowing text, or unusable navigation on a tablet or phone. The Screen Resolution Simulator lets you preview any website at specific screen dimensions without needing multiple physical devices.
How It Works
Enter the URL of the website you want to test and select a screen resolution from the preset options (or enter a custom width and height). Click Simulate to load a preview of the website rendered within the specified viewport dimensions. Scroll through the preview to check layout, readability, and navigation behaviour at that resolution.
Key Features
- Preset resolutions covering common desktop, tablet, and mobile screen sizes
- Custom resolution input for testing specific device dimensions
- Live preview rendered within the selected viewport
- Works on any publicly accessible website URL
- Free with no account required
Benefits for Users
- Identify layout issues caused by responsive design breakpoints
- Test website usability on small mobile screens before going live
- Verify that navigation menus, buttons, and forms are accessible at all sizes
- Demonstrate responsive design behaviour to clients without multiple devices
- Quickly diagnose rendering issues reported by users on specific device types
Use Cases
- Checking that a newly built website is fully responsive before launch
- Testing a client's website display on tablet and mobile screen sizes
- Verifying that an e-commerce checkout flow works correctly on small screens
- Demonstrating responsive design behaviour during a client presentation
- Diagnosing a layout issue reported by users on a specific device resolution
Related Tools
Related: What Is My Screen Resolution · What Is My Browser · Page Size Checker