インターネットでシェアしないでねって英語でなんて言うの？

Please don't put this on the internet.
I would like to ask you not to share this on the internet.
These are not to be shared on the internet. OK?
This is just for so so don't share it on the internet or with others.
This isn't for public sharing.
Please don't share these with anyone or on the internet.
I can share this with you but you need to promise not to share it with others or on the internet.

When you want to explain to someone that they should not share an item you give them with anyone or on the internet; then you can explain this in the following ways:
-Please don't share this on the internet or with other people
-This is for your eyes only. Please don't share it with anyone.

Using please is always good when making a request. "Anyone else" is a good phrase that will include anyone that isn't that person. I hope that this helps. :)

When giving a copy of an article/book/etc. to a friend, you want to say something like "Don't share it on the internet or give it to other people". You use one of the above suggested pieces of advice.

Please don't put it online or share it with others. - To "put it online" is to post it on the internet. You can use this expression for anything that can be posted on the internet such as a statement, photo, or even an entire book or movie.

This is for your eyes only. - This is a common English expression meaning that this information is not for sharing and is only to be seen by you (and your eyes).

This is not to be shared with others. - A simple way of saying don't share it with anyone.

When talking about giving people ideas or information this is called 'sharing' or 'to share' so other people can see it as well
When speaking about the internet you can also say 'online' this means the same thing
By saying 'please don't share this with anyone' you mean showing it to people or putting it on the internet as well