npFixit is a Chrome extension developed by netplan_jp. It is a font fix extension that allows users to fix the font of content to "Meiryo". This extension was inspired by a similar font fix extension that was recommended for preventing character garbling. However, npFixit takes it a step further by allowing users to customize the font size, font color, and background color. For example, users can set the text color to white and the background color to black, creating a high contrast display for all pages.

The latest update on July 4, 2012, added support for Chrome extensions with Manifest Version 2. It also introduced the option to enable or disable the functionality of npFixit. Additionally, the color selection library was changed to jscolor.