I'll create a file converter web page with a clean, modern interface that allows users to select file formats and upload files for conversion.

This file converter web page includes:

1. Format Selection:

   • Two dropdown buttons labeled "From" and "To" that display various file format options (PDF, JPEG, PNG, DOCX, etc.)
   • Visual indication of the currently selected formats

2. File Upload:

   • Drag-and-drop area for file uploads
   • Click-to-browse option
   • File validation to ensure the uploaded file matches the selected "From" format

3. Conversion Process:

   • Progress indicator during conversion
   • Error handling with toast notifications
   • Download button for the converted file

4. Backend Integration:

   • API route handlers that connect to your existing backend
   • The /api/convert endpoint accepts the file and format selections
   • The /api/download endpoint handles delivering the converted file

The interface is fully responsive and provides clear visual feedback at each step of the conversion process. You can customize the file formats list and styling to match your specific requirements.

To use this with your existing backend, you'll need to modify the /api/convert/route.ts file to call your actual conversion logic instead of the placeholder implementation.

I'll create a file converter web page with React that has "From" and "To" buttons with dropdown options for different file formats. Here's a complete implementation:

This file converter interface includes:

1. Format Selection Dropdowns:

   • "From" and "To" buttons that open dropdowns with various file format options
   • Supports common formats like PDF, JPEG, PNG, DOCX, etc.

2. File Upload Area:

   • Drag and drop functionality
   • File selection via browser dialog
   • Shows the selected file name

3. Conversion Process:

   • Progress indicator during conversion
   • Success/error messages
   • Download button after successful conversion

4. Responsive Design:

   • Works well on both mobile and desktop devices
   • Clean, modern UI with clear visual hierarchy

The code includes placeholder functions for the actual conversion process. You'll need to connect these to your backend API by uncommenting and modifying the fetch call in the handleConvert function to match your backend's API structure.

To use this in your project, you'll need to:

1. Set up a Next.js project with Tailwind CSS
2. Install the required dependencies (shadcn/ui components)
3. Connect the frontend to your existing backend API

The interface is ready to be integrated with your backend file conversion service.