how to shorten the url in a mathematical approach

Question

I am looking into the possibility of shortening / encrypting a url which will be from 150 to 250 characters in length to maximum 12 characters using an algorithm. Initially I a

Answer 1

Sorry, but no way for that. In this case shorten means losing the unique information. Maybe you could generate unique key(hash) for every string, but it will not help you unpack the data, unless there is no dictionary(static information) provided.

Check how ZIP or RAR is working, for example