Sounds like you are receiving UTF-16 and treating each byte as a character. Try changing 

print OUTFILE $mech->response->content();

[download]

to 

print OUTFILE $mech->response->decoded_content();

[download]

If that doesn't work, you'll need to decode it yourself (probably with decode 'UTF-16', but decode 'UTF-16le' or decode 'UTF-16be' may be necessary).

If Spreadsheet::WriteExcel doesn't encode it for you, you'll need to encode the data you place in Excel. I don't know which encoding it expects.

In reply to Re: wrong encoding using WWW::Mechanize by ikegami
in thread wrong encoding using WWW::Mechanize by panchuloguay

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