Can I install a Magento 1.x extension on Magento 2.x?

Despite the similarity in their names, Magento 1.x and Magento 2.x completely differ from each other.

Due to technical diversities, extensions developed for Magento 1.x will not operate under Magento 2.x.

If you wish to add new functionality to a website powered by Magento 2.x, you will require an extension developed specifically for this platform.