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

javascript image html qr-code
Daniel Ruf picture Daniel Ruf · Jun 16, 2012 · Viewed 123.4k times · Source

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

free_easy picture free_easy · Jun 16, 2012

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)

Related questions

Programmatically change the src of an img tag

How can I change the src attribute of an img tag using javascript? <img src="../template/edit.png" name=edit-save/> at first I have a default src which is "../template/edit.png" and I wanted to change it …

Read More
execute function after complete page load

I am using following code to execute some statements after page load. <script type="text/javascript"> window.onload = function () { newInvite(); document.ag.src="b.jpg"; } </script> But this code does not work properly. The function is …

Read More
Render HTML to an image

Is there a way to render html to image like PNG? I know that it is possible with canvas but I would like to render standard html element like div for example.

Read More