How do I URL-encode URLs?

URL encoding stands for encoding certain characters in a URL by replacing them with one or more character triplets that consist of the percent character "%" followed by two hexadecimal digits. The two hexadecimal digits of the triplet(s) represent the numeric value of the replaced character.

Encode the URL and add as a parameter to the request. The URL can easily be encoded with javascript, for instance encodeURIComponent(location.href). Read more about it Here or Here.

Example:
//app-[REGION].readspeaker.com/cgi-bin/rsent?customerid=[ID]&lang=[lang_code]&readid=[READID]&url=https%3A%2F%2Fwww.readspeaker.com%2Fsolutions%2Ftext-to-speech-online%2Freadspeaker-webreader%2F