Custom QR Code Generator with Center Logo Integration

Overview

A comprehensive, browser-based utility for generating, styling, and customizing QR codes with integrated image overlay support. This application performs all processing client-side, ensuring user privacy and instant rendering.

Technical Design

• Stack: React or Vue.js for state management, qrcode.js or qrcode-generator library for core logic, and html2canvas for export functionality.
• Storage: No backend required. All logic executes in the browser.

Layout Structure

• Two-Column Responsive Dashboard:
  • Left Sidebar: Controls and Input fields.
  • Right Viewport: Real-time canvas preview of the QR code.

Core Features

1. Data Input Types

• URL: Redirect users to a website.
• Plain Text: Embed short strings or serial numbers.
• Contact Info: Generate a vCard string.
• Wi-Fi Details: Auto-join network configuration.
• Email/SMS: Pre-filled message templates.

2. Styling Controls

• Color Picker: Adjust foreground and background colors (support for hex codes and alpha channels).
• Logo Integration:
  • File upload button (image input).
  • Center-offset slider to position logo.
  • Size slider to adjust logo percentage coverage relative to QR code size.
  • Corner radius settings for logo masking.
• Module Shapes: Select between standard square pixels or rounded dots for the QR pattern.

3. Advanced Configuration

• Error Correction Level: Toggle between L (7%), M (15%), Q (25%), and H (30%) correction levels to ensure readability when a logo is present.
• Quiet Zone Adjustment: Toggle padding around the QR code for easier scanning.

4. Export Capabilities

• Format Options: Download as PNG (fixed resolution) or SVG (vector quality).
• Dimension Control: Input fields for width/height in pixels for PNG exports.

User Experience (UX)

• Live Preview: Immediate re-rendering on every user input change.
• Responsive Design: Mobile-first approach, ensuring controls stack vertically on smaller screens.
• Animations: Subtle CSS transitions when switching input types and smooth loading states for image processing.
• Accessibility: ARIA labels on all sliders and inputs, ensuring full screen-reader support.

Color Palette

• Primary: Clean professional blue (#2563eb) for action buttons.
• Background: Soft light gray (#f8fafc) for the application background.
• Surface: Pure white (#ffffff) for control cards to provide visual depth.