Generators
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This page is an online two dimensional code generator which is written in PHP. It can generate QR Code , Data Matrix , Aztec Code and Micro QR Code for the time being.
QR Code and 2D Code Generator | Kerem Erkan
QR Code Printing Guidelines & Best Practices 32 × 32 mm or 1.25 × 1.25 inches, excluding quiet zone (the white space included around the QR Code in the EPS) is the minimum size that guarantees that ALL camera phones on the market can properly read the QR Code. 26 × 26 mm or roughly 1 square inch, excluding quiet zone covers 90% of the phones on the market. - OUR CURRENT RECOMMENDATION The latest camera models, which have improved macro capabilities, can deal with QR Codes that are less than 10 mm (0.4 in) wide and high.
QR Code Generator - Create Your Own QR Codes - Delivr