QR CODE max char length

问题:

I've read that QRCODES has about 4,290 alphanumeric chars limit (about 4kb).

Is it true and is there any way to increase their memory size?

I would like to have more space on if possible: P

回答1:

A summary of the specification is here:

  * http://en.wikipedia.org/wiki/QR_code

    Numeric only    Max. 7,089 characters (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
    Alphanumeric    Max. 4,296 characters (0–9, A–Z [upper-case only], space, $, %, *, +, -, ., /, :)
    Binary/byte     Max. 2,953 characters (8-bit bytes) (23624 bits)
    Kanji/Kana  Max. 1,817 characters

The specification itself is here:

• https://www.iso.org/standard/62021.html

As far as "more space", you should think of the QR code as a "link", or a "shortcut" to your URL. Clicking the QR code brings the user to web site; once they're there, you have as much space as you want.