Of course, you can show that you’re single online. If you are using Facebook, there is an option that allows you to include your marital status and you can either put it in private or in public. Once you decide to put it in public, people will be able to see that you’re single once they access your “about” page.
If you are using several dating applications, there is always an option to include your marital status – you can either choose single, married, or divorced. However, if you are using Instagram and Twitter, there is no option which allows you to display your marital status. You can, however, include this information on your “about me” which is always visible to the public.