URL is being converted

$request["state"]["redirect_uri"] =base64URLEncode( "http://stage.researchstudyonline.com:81/index.php/Configure/report_generator_amazing");
but when it gets to my email it looks like this:
https%3A%2F%2Fstage.researchstudyonline.com%3A81%2Findex.php%2FConfigure%2Freport_generator_amazing
What has happened to it? Should I not use base64URLEncode()?

proof that an old dog can learn new tricks

Thx. What is that decode string for?

---

What is the decode showing me?

proof that an old dog can learn new tricks

there is a need to replace some character . and replace back to decode

'+' with '-'
'/' with '_'

Thanks. Once I replace + and / will the browser be able to understand the new string? I manually replaced the / with _ . I don't have any +. When I do this in the browser I get:

Did you mean: http:__stage.researchstudy online.com:81 index.php Configure report_generator_amazing

Should it work in the browser?

proof that an old dog can learn new tricks