QR Code Generator with Custom Image

Let me create a React application that generates QR codes with a custom image embedded in the center. This is a great way to make your QR codes more visually appealing while maintaining their functionality.

Features

This QR code generator includes:

• Custom URL/Text Input: Enter any URL or text to encode in the QR code
• Logo/Image Upload: Drag and drop or select an image to embed in the center of the QR code

• Customization Options:

  • Adjust logo size (percentage of QR code)
  • Change QR code size
  • Customize QR code color
  • Customize background color
• Download Functionality: Save your custom QR code as a PNG image

How It Works

1. The application uses react-qrcode-logo to generate QR codes with embedded images
2. react-dropzone handles the image upload functionality
3. html-to-image converts the rendered QR code to a downloadable image
4. The QR code automatically adjusts to maintain scannability even with the embedded logo

Technical Notes

• The QR code maintains its error correction capability even with an image in the center
• The "removeQrCodeBehindLogo" option ensures the logo doesn't interfere with the QR code's functionality
• The application is fully responsive and works on mobile, tablet, and desktop devices

To use this application, simply enter your URL, upload an image, adjust the settings to your liking, and download the generated QR code.

Yes, the QR code generator does support SVG files as logos. In the current implementation:

1. The file upload component is configured to accept SVG files along with other image formats:

2. When you upload an SVG file, it's converted to a data URL using FileReader's readAsDataURL method, which works for SVG files.
3. The react-qrcode-logo library used for generating the QR codes can handle SVG images as logos.

However, to ensure the best experience with SVG logos, I can make a small enhancement to the code to better handle SVG files specifically. Here's an update:

This update explicitly mentions SVG support in the UI and adds some additional logging when an SVG file is detected.

Tips for Using SVG Logos

When using SVG files as logos in your QR codes:

1. Simple SVGs Work Best: Complex SVGs with many paths may not render as clearly at smaller sizes.
2. Transparent Background: Ensure your SVG has a transparent background for the best integration with the QR code.
3. Proper Viewbox: Make sure your SVG has a proper viewBox attribute for correct scaling.
4. Size Considerations: You might need to adjust the logo size slider to a larger value for SVGs to be properly visible, especially if they contain fine details.

The QR code generator should now clearly indicate that it supports SVG files, and it will handle them appropriately when uploaded.