https://chrome.google.com/webstore/...ilgdlmhefphglae

Set Character Encoding

Provide right-click menu to manually set character encoding for web pages. The selected character set will automatically apply to all pages on the same site. Select "Use page default" to cancel it. This extension modifies http response headers to override original character set, so when installing Chrome will say "it can read and change all your data on the websites you visit". Just let it go because that is exactly how it works.