eSign document with QR-code signature

What is a QR-code?

QR-code (or Quick Response code) is a sort of two-dimensional barcodethat consists of black squares arranged in a square grid on a white background. QR-code can be read by smartphone camera or specialized devices that are dedicated to QR reading - hand-held scanners, handy terminals, fixed scanners that are used after placing it on a desktop, or embedding it in other devices. Usually QR-codes contain data that points to a website or application, emails, or phone numbers, product identifiers, or trackers. Therefore QR-code application scope extends general marketing and item identification to document management.

How to eSign document with QR-Code signature 

GroupDocs.Signature allows to eSign documents with QR-codes of various types that is listed in a table below. 

 Aztec codeDataMatrix codeGS1 DataMatrix GS1 QR code QR
  • transport and ticketing;

  • in airline industry for electronic boarding passes;

  • in rail for tickets sold online and printed out by customers
    or displayed on mobile phone screens. Code is scanned
    by a handheld scanner by on-train staff or at the turnstile
    to validate the ticket.

  • medicine - patient identification wristbands
    and labels for unit-of-use medications etc.


  • printed media such as labels and letters;

  • industrial engineering purposes - marking
    components etc;

  • food industry - to prevent food products
    being packaged and dated incorrectly;

| Used in

  • Healthcare;
  • Government;
  • Industrial.

Encodes item additional information, such as:

  • weight;
  • expiration date;
  • batch number;
  • date of manufacture;
  • etc.

| Userd in marketing to encode
additional item information
on the package | Widely used in automotive industry
and mobile applications. Useful for encoding
large amount of data characters and specific URLs. | | Length | 3067 alphanumeric,
3832 numeric,
1914 bytes | 2335 alphanumeric, 3116 numeric | 2335 alphanumeric 3116 numeric,
1556 bytes | 7089 alphanumeric 4296 numeric,
2953 bytes | 4296 alphanumeric,
7089 numeric,
2953 bytes | | Example | ) | ) | | |

While adding QR-code electronic signature to document GroupDocs.Signature the main settings are text to be encoded and QR-code type which should be specified via QrCodeSignOptions class. 

Here are the steps to eSign document with QR-code signature:

The code snippet below demonstrates how to sign PDF document with QR-code signature.

using (Signature signature = new Signature("sample.pdf"))
    // create QRCode option with predefined QRCode text
    QrCodeSignOptions options = new QrCodeSignOptions("JohnSmith")
        // setup QRCode encoding type
        EncodeType = QrCodeTypes.QR,
        // set signature position
        Left = 100,
        Top = 100
    signature.Sign("SampleSigned.pdf", options);

More resources

Advanced Usage Topics

To learn more about document eSign features, please refer to the advanced usage section.

GitHub Examples 

You may easily run the code above and see the feature in action in our GitHub examples:

Free Online App 

Along with full-featured .NET library we provide simple, but powerful free Apps.
You are welcome to eSign PDF, Word, Excel, PowerPoint documents with free to use online GroupDocs Signature App.