Hi guys,
Is it possible to connect my ESP WiFi module to network, so that i don't have to program SSID in it? Like i just hook my ESP to power and then go to localhost url, and put SSID there? Or are there some other alternatives?
I hope you get, what i mean 
Than you,
Rat
Not really.
Even if you have an open network you still need to give it an SSID or tell it to scan for open networks and then attach.
There are a few examples of scanning for networks to identify signal strength and type of connection.
You could modify that to attach to the strongest open one.
I am sure there are examples on the net or you could ask in the more specific ESP groups.
Here is a link that may be of interest to you
That looks at doing similar to what you want.