It's simple: 
use Encode qw(decode);

my $input_string = 'some octets';
my $input_encoding = 'cp1250';  # or 'iso-8859-1', or 'shiftjis' or wh
+atever

my $utf8 = decode($input_encoding,$input_string);

[download]
Note that there is no reliable way of determining $input_encoding automatically.
"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re: I need to convert the text into UTF-8 from any charset by Joost
in thread I need to convert the text into UTF-8 from any charset by mohiddinb

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