A QR code is a specific matrix barcode that is readable by dedicated QR barcode readers and mobile phones.
By adding QR codes to your blog posts you can enhance mobile users’ experience and they can visit the URLs easily by that. Earlier I showed you how to generate QR codes using Goo.gl. Now we’ll see how to generate QR codes for your blog and blog posts.
Creating QR Codes For Blog Posts
We are using Google Chart Tools for doing this. You just need to add the following code in single.php file or anywhere you want.
or
Creating QR Code For Your Blog
For the main URL, https:, I can use this for generating QR Code.
http://chart.apis.google.com/chart?cht=qr&chs=200×200&chl=https:
You can also add QR code parameters to customize how you want it to be. You can scan it with your QR code scanner and check whether it is working or not.
You can try QR Code Plugin for adding QR codes in Blogger.
lol this is really cool
i made my qr code 
I use a "bookmarklet" — that is, I create a bookmarket that has a bit of JavaScript in it — that makes a QR code of whatever URL I'm on now. To do that (on Firefox, other browsers make be different), right-click on the Bookmark bar, select "New Bookmark…", set the name to anything useful like "QR" and set the location to
javascript:window.location="http://chart.apis.google.com/chart?chs=250×250&cht=qr&chl="+escape(window.location)
You can use to generate the QR's for later use, or just if you want to see something on your phone, press the "QR" button and scan the resulting image with your phone.
Thanks for the information, As I am new to QR codes for posts this might help me to get mobile users.
Hey Pradeep,
This code didn't worked for me. !
instead of I used this –
<img src="https://chart.googleapis.com/chart?chs=150×150&cht=qr&chl=<?php the_permalink(); ?/>&choe=UTF-8" width="150" height="150" alt="QR code"/>
Now it is the age of mobile phones, so care about preview of our sites with enhanced features in mobiles have sure beneficial.
Great!! Is there any way to add QR codes to Blogger blogs???
Hey m new 2 blogging n i just wantd 2 knw hw 2 make a mobile theme 4 d blog?? as in is der ne plugin dat wil do dat o do i ve 2 design it??
Thanks for the information, As Iam new to blogging this might help me to get mobile users
Hi,
Just want to know the benefits of having bar-code in our blog ?