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Open Source .NET QRCode Library

Today I released the source code for the .NET QRCode library.

.NET QRCode library is a .NET component that can be used to encode and decode QRCode. QRCode is a 2 dimensional bar code that originated in Japan. Nowadays it is widely used in a wide range of industries, e.g. for vehicle parts tracking and inventory management.

QRCode Library provides functions to:

  1. Encode content into a QR Code image which can saved in JPEG, GIF, PNG, or BITMAP formats
  2. Decode a QR Code image

The library can be used in any .NET 2.0 Windows Application, ASP.NET web application or Windows Mobile device application.

Some sample screenshots are displayed below:

Encoding Screen on the Desktop



Decoding Screen on the Desktop



Encoding Screen in Windows Mobile



Decoding Screen on Windows Mobile


More details on the component can be found on the website.

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RSS Feed for This Post8 Comment(s)

  1. Eyong akem | Jun 2, 2008 | Reply

    hello to the staff of this team,dont have much to say but if you guys could keep the hard work and improve on the sms service it will be nice
    good work

  2. Chuck | Jul 26, 2008 | Reply

    I am interested in QR Codes to automate some realtime tracking needs.

    However, I have seen a system running on a Windows Mobile system that aquired the barcode in real-time via the built-in video capture (video, not pictures).

    I would like to build a custom app similar both on Windows Vista (using a laptop’s built in webcam) and Windows Mobile (using built in webcam).

    Can you make any suggestions on where to start with this? The video capture is the show stopper.

  3. mikewong | Oct 21, 2008 | Reply

    The code was tested working fine.Tq.

  4. Fish | Jan 22, 2009 | Reply


    My company is interesting in QR Code and would like to make a webpage which allow people to submit a picture, e.g. jpg, gif , png and then decodes its message. Do you have any suggestions? Of course, we are willing to pay for this services.


  5. tolily | Mar 23, 2009 | Reply

    Hello, my company want to use the source code of the QR Code, which is downloaded from the webpage:

    Is it free? And what is the charge for the future services?

  6. Jon | Jun 11, 2009 | Reply

    I am interested in using you DLL and would like to know if you have any asp samples of how to use the DLL on IIS.

  7. Loic Feinbier | Aug 28, 2009 | Reply

    Hi. First of all thank you for developing this magnificient QR-Code Library!

    I am currently programming an application for my company (a Steel manufacturer), which we will use to print product labels for identifying materials in our internal transport chain. We would like to print QR-Codes onto those labels, using your QR-Code library.

    Given that our application may be considered commercial (even though its purley being used internally and not to be sold to others), I would greatly appreciate if you could OK our use of your library for the described purpose.

    Thank you very much in advance!

  8. admin | Aug 28, 2009 | Reply

    This library is free to use for commercial purpose.

    We are in the midst of porting this code. You are free to modify the code, and contribute back the changes back.

2 Trackback(s)

  1. From All about Mobile Life - Net QRCode Library - Also for Windows Mobile | Sep 14, 2007
  2. From Encode and Decode QRCode on Windows Mobile | | Oct 6, 2007

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