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This is a free service to read and decode QR codes on-line. Upload a picture with a QR code in it or a web reference to an image of a QR code and this decoder will try to read it and show what is encoded in the QR code.
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QR Code reading tips!
DO USE ASCII alpha numeric characters for file names, DO NOT use punctuation and characters like %^&*/|\{}[]. If you use 'strange characters in file names, they will not be accepted.
This QR code decoder has been programmed to act like an average smartphone. It's not rocket science!
- Focus and format. (ensure focus and QR code format are GOOD)
- Image area considerations. (ensure QR code is at least 50% of the image area)
For examples see the FAQ
QR code generator software
Generate QR codes with the worlds most advanced QR code generator software.
What 2D codes can this decoder read
The qr4 online QR code decoder reads QR codes and Datamatrix codes only.
What do QR codes and Datamatrix codes look like
QR Code for https://blog.qr4.nl
Datamatrix Code for https://blog.qr4.nl
Offline QR Code Decoder
Desktop and laptop QR Code decoder. Requires a webcam and Windows® Vista and earlier. More information on this application can be found at: 'Installing the desktop QR code decoder' video on YouTube®. Detailed blog article on this decoder in Dutch.
What 2D codes will not work with this decoder:
This is a proprietary 2D barcode from Microsoft called a 'Microsoft Tag'. These codes are generated only by Microsoft and a special 'tag' reader
from Microsoft is needed to be able to read them.
More information on these 2D codes can be found at https//tag.microsoft.com/consumer/index.aspx
This is a proprietary 2D barcode from ScanLife called a 'EZcode'. These codes are generated only by ScanLife and a special reader
from ScanLife is needed to be able to read these barcodes.
More information on these 2D codes can be found at https//web.scanlife.com/index.php
This is a proprietary 2D barcode from Connvision called a 'Beetagg'. These codes are generated only by BeeTagg and a special reader
from BeeTagg is needed to be able to read these barcodes.
More information on these 2D codes can be found at https//www.beetagg.com/
A Dutch proprietary 2D barcode from a company called 'Shotcode'. These codes were generated by Shotcode alone and a special reader application
was required to be able to read these barcodes.
Shotcode became known in 2006 with this barcode, but were far ahead of the market at the time, the company stopped operations in 2008.
A Taiwanese proprietary 2D barcode from a company called 'SimpleAct'. These codes are called QucikMark generated by SimpleAct alone and a special reader application
is required to be able to read these barcodes.
More information about QuickMark can be found at https//www.quickmark.com.tw/En/basic
An Ameican proprietary and patented 2D barcode from a company called 'NeoMedia'. These codes are called Qode appear to be generated by NeoMedia alone and a special reader application
is required to be able to read these barcodes.
More information about Qode can be found at https//www.qode.com/en/hiw.jsp