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Core Features & Logic
1. Matrix Encoding Engine
QR codes are complex two-dimensional barcodes. The tool uses QRCode.js, which handles the Reed-Solomon error correction and data masking required to make the code scannable even if part of the image is damaged or obscured.
2. Real-time Generation
The app uses the oninput event listener. As you type a URL or text string, the JavaScript function clears the previous SVG/Canvas element and re-renders the matrix instantly. This provides a "live" feel common in premium SaaS tools.
3. Customizable Error Correction
Search engines and scanners use different "Correction Levels."
Level L (7%): Smallest file size, good for clean digital displays.
Level H (30%): Largest file size, allows for the code to be scannable even if it's printed on a dirty or curved surface.
4. Monetization Ready (Google Ads)
The layout includes two strategic ad placements:
Leaderboard (Top): Best for high-impact visibility.
Skyscraper (Sidebar): High-viewability slot that follows the user's eye as they adjust settings.
Implementation: You must replace
ca-pub-XXXXXXXXXXXXXXXXwith your verified AdSense Publisher ID.
5. Export System
The tool extracts the src attribute from the generated <img> tag (which holds the Base64 data) and triggers a virtual click on a hidden anchor tag to download the PNG file directly to the user's device.