Web Page Canvas is a free Chrome extension developed by damiang that allows users to draw directly on live web pages. With this extension, you can use a brush tool to draw lines and change the color or size of the brush. It also includes an eraser tool and a highlighter tool for more precise editing.

One of the standout features of Web Page Canvas is its ability to take full-page snapshots. This means that you can save your drawings and refer back to them later. The extension also includes a library where you can manage all your saved drawings.

It's important to note that after installing or updating the extension, you will need to reload the active tabs for it to work properly. Additionally, Web Page Canvas does not work with PDF files or Chrome's default pages. Drawings on pages with a height greater than 6000 pixels cannot be saved.

Overall, Web Page Canvas is a handy extension for those who want to annotate and mark up web pages. It offers a range of drawing tools and the ability to save and manage your drawings effectively.