A Quick Response (QR) code is a two-dimensional barcode capable of storing significantly more information than a traditional linear barcode. QR codes organize data as a matrix of black and white squares (modules), which can be read by smartphones and optical scanners.

Error Correction

QR codes employ Reed-Solomon error correction, allowing them to remain readable even if partially damaged or obscured. There are four error correction levels:

• L (Low): ~7% data recovery. Best for simple URLs with clean designs.
• M (Medium): ~15% data recovery. Standard choice for general use.
• Q (Quartile): ~25% data recovery. Recommended for industrial environments.
• H (High): ~30% data recovery. Essential for QR codes that contain logos or custom designs.

SVG vs. PNG

• PNG (Portable Network Graphics): A raster format ideal for web use, digital screens, and quick sharing. However, PNGs can pixelate when scaled up for large print materials.
• SVG (Scalable Vector Graphics): A vector format perfectly suited for print (e.g., billboards, business cards, merchandise). SVGs maintain perfect clarity regardless of scale because they use mathematical paths instead of pixels.