QRazyBox is a web-based application (a toolkit), that used to analyzing and recovering damaged QR Code.

QRazyBox lets you recover QR Code by redrawing and reconstructing it with Paint-like editor. It also provides several sub-tools to help you analyze and recover faster and more efficient.

• Reconstruct QR Code by drawing pixel by pixel
• Decode and read unscannable QR Code
• Save and load existing work for later use
• Import/export QR Code from/to Image file or Text file
• Currently support up to QR Code Version 40 (177x177)
• Support both Error and Erasure Correction using universal Reed-Solomon decoder
• Extract valuable information although from badly damaged QR Code
• Simulate data unmasking for manual data analysis
• Easy to use
• Free and open source :)

Documentation page of this tool can be accessed in following URL :

https://merricx.github.io/qrazybox/help/

• thonky.com
• https://github.com/LazarSoft/jsqrcode
  
• https://github.com/waidotto/strong-qr-decoder
• https://en.wikiversity.org/wiki/Reed–Solomon_codes_for_coders
• https://markjs.io/