How to decode UTF-8 text?

[Andrey via Digitalmars-d-learn]

Hello,
I have got some text with UTF-8. For example this part:
<title>Παράλληλη αναζήτηση</title>

How to decode it to get this result?
<title>Παράλληλη αναζήτηση</title>

I have tried functions like "decode", "byUTF", "to!wchar"... but 
no success.

Input string is correct - checked it with 
"https://www.browserling.com/tools/utf8-decode";.