Is there way to force Google to think that sub domain as totally separated are from main domain?

Question

Is there way to force Google to think that sub domain as totally separated are from main domain?

This is the situation. We have a web design agency. We have made some online tools for public.

1. Free Image hosting Service
2. SEO Tool
3. Online Calculator and many more..........

Getting separated domains and renewing them quite expensive as well as manging them is also time consuming work.

So we are going to use sub domains. Assume that one main domain is example.com

So domains will be.

1. imagehostingservice.example.com
2. seotool.example.com
3. calculator.example.com

The problem I have,

If there is penalty for example.com it will affect to other websites also because they are sub domain of example.com.

If that thing happen it will waste lots of our time effect to build those tools.

If Google consider our main domain and 3 sub domains are totally separated domain our problem will be solved.

So is there any solution?

Answer 1

Google considers sub domain as separate website but one common thing with it is that default ip address which is legally not possible to change or use as proxy ip for such purpose. So... NO legal method to force search engines like google to consider subdomains as separate domain.

Whereas possible you can consider Massimiliano Rubino's suggestion.

Two things for your consideration if you are not able to accept his suggestion:

1. Most of the time Sub Domains affects if Main Domain get penalty.
2. If your single Sub Domain get penalty then it won't affect your Main Domain but has some exceptions
3. But if your Multiple Sub Domains has several kind of penalties by Search Engines then your Main Domain will affect definitely.

Answer 2

Google consider a sub domain as a completely different website for his domain. So if your domain rank well in "cars (for example) a sub domain can rank well in "pets care".

But Google still know if 2 or more website are related even if them are on different domains and different servers, easier if it is a sub domain.

So as from the comment of Stephen Ostermiller if you do something wrong will be partially reflect on the main domain, as well as if you do something good.

If you want to keep a clear image and easy navigation system on your main site without mess up with link between subdomains and tools and blogs or whatever, I can suggest you to have only 2 domains (so not so expensive): 1 is the main one, for your web design agency, the other one you can use for tools and experiment and anything you like. This not for Google but also for your pace of mind that keep separate the "experiment" (for example maybe in the future you will shut down a tool). example:

main site: yourmaindomain.example

other services: yourseconddomain.example/imagehostingservice

yourseconddomain.example/seotools

yourseconddomain.example/calculator

And keep them in 2 different cPanel, not for SEO reason but to keep easy the navigation of the main website without using subdomain that maybe point to folder also reachable from other URL (example: you have a subdomain -sub.example.com- that point to public_html/subdomainfolder. That folder you can reach by sub.example.com but also from example.com/subdomainfolder and this can generate confusion when search engine try to map your site.

Then you can link to each other some pages if need.

Answer 3

Nope, There is no way to indicate google that sub-domain is "totally" different or independent. By default google considers sub-domain as separate domain but there are some other factors too, one of that is if your sub-domain found in any kind of malfunctioning activity it will treat your main as well as all other sub-domains as same and will treat accordingly.

In your case my suggestion is to use sub-directory @Rubino suggested. It will give advantage to your all tools to leverage traffic and ranking faster.