Katakana 2 Romaji is a Chrome extension developed by Martin Sidaway. This free extension falls under the category of Browsers with the subcategory of Add-ons & Tools. Its main purpose is to convert Japanese katakana into rōmaji, which is the Latin alphabet.

Katakana is widely used in Japanese to write English loan words, and this extension makes it easier to decipher these words. By enabling Katakana 2 Romaji, all the Japanese katakana on the web pages you visit will be automatically converted into rōmaji. Additionally, hovering your mouse pointer over the generated rōmaji will display the original katakana. The romanization used by this extension is close to revised Hepburn and can handle a wide range of extended katakana.

It's important to note that this extension requires full access to all the web pages you visit, but no data is transmitted as the conversion process happens entirely in your browser. You have the option to disable the extension at any time in the Extensions tab, and it is automatically disabled in private browsing mode.