True Full Page for CodePen is a Chrome add-on developed by chrisbolin. It is a useful tool for those who use CodePen.io for prototyping and demoing. This add-on allows users to view their pens in a distraction-free environment without the CodePen header.

With True Full Page, users can toggle the CodePen header on or off by simply clicking the True Full Page icon in the location bar. This feature is especially handy when users want to showcase their pens without any distractions or headers.

The add-on supports three different views: "full", "pen", and "details". Users can choose the view that suits their needs and easily switch between them.

Overall, True Full Page for CodePen is a valuable add-on for CodePen users who want a clean and distraction-free viewing experience for their pens.