Fix Bad Chars

I sometimes have bad characters in my webpages:

BadChars

I know what causes these: smartquotes and other exclusive-Windows symbols. But is there any way of replacing these on my pages without doing a search-and-replace? Can I add something to the <header> section to change the content-type?

<meta http-equiv=”Content-Typecontent=”text/html;charset=utf-8“/>
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