Sign documents and Images electronically by adding QR code using C#. Signature API for .NET supports QR Codes in Word, Excel, PDF, PNG, JPG, WebP, etc....supports Aztec Code, DataMatrix Code, GS1 DataMatrix, GS1 QR, QR types...code types. (Aztec, DataMatrix, GS1 DataMatrix, GS1 QR, QR) Call...