What is the difference and why should this happen? · i am interested in knowing why %20 is used as a space in urls, particularly why %20 was used and why we even need it in … Sometimes the spaces get url encoded to the + sign, and some other times to %20. · as the aforementioned rfc does not include any reference of encoding spaces as +, i guess using %20 is the way to go today. The common space character is encoded as %20 as you noted yourself. · a bit of explaining as to what that %2520 is : @metabyter i think it is more technically correct to phrase the question as in a url, should i encode the spaces using %20 or + in the query …