Does my credentails [ in any form ] will be stored with this site ?
No, This site does not store your credentails in any form for any purose. Not even your email address
Is it free of cost ?
Yes, It is free and it will be while it is running.
Does my content going to be store by this site ?
No, this site does not store your content in any form at any stage.
I can not see my code (</>) has any style applyed
Actully editor just apply the class to your content. You have to define css for your code(</>).