javascript - How much data / information can we save / store in a QR code?

Question

I would like to use this script https://github.com/jeromeetienne/jquery-qrcode
(or is there even a better solution?)

What I like to do is "save" some small scripts or programs and even files like xml formatted files (svg, x3d, ...) as QR code images.

But how much information (in bytes) can I save exactly to QR code images (using this javascript solution)?

Any experience with this script and using qr codes for files?
https://github.com/jeromeetienne/jquery-qrcode

Answer 1

QR codes have three parameters: Datatype, size (number of 'pixels') and error correction level. How much information can be stored there also depends on these parameters. For example the lower the error correction level, the more information that can be stored, but the harder the code is to recognize for readers.

The maximum size and the lowest error correction give the following values:
Numeric only Max. 7,089 characters
Alphanumeric Max. 4,296 characters
Binary/byte Max. 2,953 characters (8-bit bytes)