Hi Kuba,
Appreciate your answer.

I tryed out the website https://linqr.app/ and understood your point.

Thanks for your assistance, we will buy the API!

Hello,

I’m not sure if I understood the question correctly, so I will answer a little more descriptively:

QR Codes allow you to store up to about 3kB of data. The code itself knows nothing about datatype used. So if you want to save a PDF (or any other: each file is a byte array) file in a QR Code, it is possible as long as you have (or you will develop) a scanner that can understand such data and save it back as a file.

Unfortunately, most commonly available scanners (mobile apps) do not implement such function. They expect text to be written in the Code. In this way, you can, for example, save an URL (link) in the QR Code pointing to a PDF document saved on the web server or to a landing page, where it will be possible to download the document.

In addition, there are several special types of data URLs that allow you to save in a QR Code, for example, WiFi credentials or a business card. You can generate these types of QR codes using endpoints such as /qrcode/wifi, /qrcode/contact etc. Those data URLs are not part of the QR Code standard, but the vast majority of readers can automatically decode it. You can learn more about it at: https://github.com/zxing/zxing/wiki/Barcode-Contents

Regards,
Kuba Sawulski from LinQR