This extension provides a simple method to hide long description from cluttering your page. It will display a "Read More" button at specific height on long description, when customer click on the button, it expands to show the entire content.

It can be applied to the following sections:

• Product description
  
• Category description
  
• Information description
  
• Review
  
• Custom: Add a "readmore" class to any html block and it'll hide that block and add a readmore button
  

Demo:
Product description/review
Category description
Information