Native2Ascii速攻！ is a Chrome add-on that allows you to perform native2ascii conversion in JavaScript. Created by takeshi.satoh, this tool is designed to help users who want to use native2ascii in their JavaScript code.

After installation, simply click the "N2A" button to display a text area. To perform a native2ascii conversion, enter the desired string in the text area and click the "native2ascii" button. The converted text will be focused and ready for copying. Similarly, for an ascii2native conversion, enter the Unicode-converted string in the text area and click the "ascii2native" button.

This add-on is straightforward and easy to use, making it a handy tool for reading Japanese parts of JSON data returned from Web APIs. It has been updated to version 2.0, with improved aesthetics and accessibility.

For more information, visit the developer's website at [developer's website link] and their blog at [developer's blog link].