Website Mobile/Desktop Tester

Test your website's responsiveness across different devices

Desktop Preview 1920x1080

Mobile Preview 375x667

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1. Key Features:

   • Real-time mobile and desktop preview

   • Multiple device presets (Desktop, Wide Desktop, Tablet, Mobile)

   • Custom viewport support

   • Responsive design with smooth animations

   • Loading indicators

   • Error handling

   • Clean and modern UI

2. Advanced Functionality:

   • Dynamic viewport adjustment

   • Device-specific preview rendering

   • Auto-URL correction (adds http:// if missing)

   • Cross-origin frame handling

   • Interactive device selector

   • Responsive iframe containers

3. Usage Instructions:

   • Enter a valid website URL

   • Select device type from the preset buttons

   • View real-time rendering in both mobile and desktop views

   • Scroll and interact with the previews

   • Switch between different device presets

4. Customization Options:

   • Add more device presets in the devices object

   • Modify colors using CSS variables

   • Add additional testing parameters

   • Implement screenshot functionality

   • Add network throttling simulation

To use this tool:

1. Save the code as an HTML file

2. Open it in a modern web browser

3. Enter the URL you want to test

4. Switch between device views using the preset buttons