V4 IndexAble Checker is a free Chrome extension developed by V4 Visions - Free Marketing Tools. It is a useful tool for website owners and developers to quickly check the indexability of a website. With just a click on the extension icon, users can see the meta robots and canonical link information of the website they are currently viewing.

The extension checks a website's indexability by analyzing its meta robots and canonical tag. It then displays this information in a popup for easy bug fixing. The color of the extension's browser bar icon changes based on the indexability status of the website:

1. Green icon indicates that the canonical tag is identical to the URL displayed in the browser and there is no "noindex" robots attribute in the website's source code.

2. Red icon indicates that either the canonical tag is different from the URL or there is a "noindex" robots attribute in the source code.

For more detailed information, users can click on the V4 IndexAble Checker icon to view the content of the current URL's meta robots tag and canonical link. This extension provides a quick and convenient way to assess a website's indexability in Google Search.