URLEncode

URLEncode["string"] converts "string" into a URL-style, percent-encoded ASCII string.

Examples

Encode a string with spaces:

URLEncode["Hello World"]
(* "Hello%20World" *)

Encode special characters:

URLEncode["test=value&key=123"]
(* "test%3Dvalue%26key%3D123" *)

Please visit the official Wolfram Language Reference for more details.