Tool to generate a QR-Code. QR code is a 2D barcode standard made of black and white squares, recognizable with three smaller squares in its angles.
QR Code - dCode
Tag(s) : Character Encoding, Image Processing
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QR Code
QR Code Generator
Answers to Questions (FAQ)
How to create a QR code?
To create a QR-code, use the dCode form at the top of this page.
As a developper, to code a QR-code program, a QR code uses the ISO norm 18004:2015 (QRCode).
Example: 
How to decrypt a QR Code?
To read QR-Code, a quick and free solution is a mobile phone. It exists a bunch of applications, often it's integrated into the Camera app. Else use Google Goggles here (link) or Google Lens here (link) (which has plenty of other use)
Without smartphone, on Internet:
Example: X-Zing takes a URL or an image to decode barcodes here (link)
Online Bar Code Reader, another universal tool not limited to QR code here (link)
How to recognize a QR Code?
The 2D bar code has generally 3 black squares in the corners and a matrix of black and white dots.
What does QR mean in QR Code?
QR stands for Quick Response.
What is the lifespan of a QR Code?
A QR code has no time limit (no lifespan), nor a maximum number of uses. However, if the data contained in the QR code has a lifetime (like an address of a web page) then the QR code will still exist even if the web page no longer exists.
What are the variants of QR Code?
The center of the QR-Code is sometimes non-coding and therefore used to incorporate a logo. Otherwise, there are many other 2D barcodes like DataMatrix (FlashCode), Aztec, PDF 417, etc.
When QR code was invented?
First QR codes were published in Japan in 1999.
Source code
dCode retains ownership of the "QR Code" source code. Except explicit open source licence (indicated Creative Commons / free), the "QR Code" algorithm, the applet or snippet (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or the "QR Code" functions (calculate, convert, solve, decrypt / encrypt, decipher / cipher, decode / encode, translate) written in any informatic language (Python, Java, PHP, C#, Javascript, Matlab, etc.) and all data download, script, or API access for "QR Code" are not public, same for offline use on PC, mobile, tablet, iPhone or Android app!
Reminder : dCode is free to use.
Cite dCode
The copy-paste of the page "QR Code" or any of its results, is allowed as long as you cite dCode!
Cite as source (bibliography):
QR Code on dCode.fr [online website], retrieved on 2022-10-05,
