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The Unusual string "?wpcf7=json" Will It Hurt My SEO?

I am doing SEO ( Search Engine Optimization ) for this site. Since what I have now is only about an average of 100 visitors from Google Daily. And upon checking some Google stuff and just found out some unusual thing happening at my pages.

Anybody experiencing this kind of unusual string added at the end of your post Url? [ ?wpcf7=json ] at Google result . According to Google it has indexed about 57 pages out of 357 Indexed by Google is having an unusual string like this  [ ?wpcf7=json ]. Below figure shows how I get the details of this. ( I just type + ?wpcf7=json ) as shown in below captured image.

Actually there are no much specific information about this string but I believe there are lots of blog infected by this scenario.

Upon searching I and research I found the following information which might be of help to those who have the same problem.

What is wpcf7 ?

Upon googling the word wpcf7 most of the associated result is showing from the plug-in Contact Form 7 although it is not installed at my site at the moment it was one of the plug-in that I tested for this site. And it does not work well with me that I have decided to change it for a different plug-in. [ Contact Form 7 ]

What is json ?

According to wikipedia

JSON (JavaScript Object Notation) (pronounced /?d?e?s?n/, like Jason) is a lightweight computer data interchange format. It is a text-based, human-readable format for representing simple data structures and associative arrays (called objects). The JSON format is specified in RFC 4627 by Douglas Crockford. The official Internet media type for JSON is application/json.

The JSON format is often used for transmitting structured data over a network connection in a process called serialization. Its main application is in Ajax web application programming, where it serves as an alternative to the traditional use of the XML format.

What about WordPress support ?

Upon searching I found that there is only one thread about this topics here. The thread does not show the cure for this thing so I am thinking that based on one of its comment that it is not harmful.

Is it harmful to SEO ?

I believe it is, since it is taken as a duplicate content . An example is and both of them is cached by google and both of them show same content and we all know that it is not good to have a duplicate content from Google point of view.

Is it bad for my site ?

In an SEO point of view yes it is. But other than that I don’t have any idea. Actually I don’t have particular answer for this question. But I did a little experiment and it goes like this :

I choose two site which I know is also doing SEO in their site and I tried typing their URL + ?wpcf7=json string and find what will be the result. And the result is as follows :

I tried and it leads me to Yugatech Home page

I tried and it leads me to Marhgil Home Page

I tried searching if any of this above site mentioned has an indexed page by google with the same string and I found out that there is none. I did the same exercise as above.


I believed that there is some leak at my theme, and this I don’t know where. I will continue to check if this indexed page by google will try to increase and after that I have to decided on my next step. I just make a “nofollow” for my feeds the other day.

What can you do to Help Me ?

If any of you has any idea about this problem or do you have any solution It would be glad to know your opinion. BTW there is not much answer in the web regarding this problem, So it is a great opportunity for you to have visitors at you site if you can give a good answer.


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