InstapaperBookmarklet is a useful Chrome extension, made to make it easy for you to send web pages to Instapaper using its bookmarklet.

Features:

Install it on Chrome and add a button to your web browser's toolbar, and you're done. 

You can add it to Google Chrome's "More Tools" menu, on macOS you can find it in the extension section of your OS's main menu, and on Windows you can find it in your system's "Chrome Extensions" section.

The Instapaper bookmarklet has a single click feature which lets you send pages to Instapaper. It also has a double click feature which opens a new tab. This makes it very simple to send a page to Instapaper.