Magento 2 restore cancelled order is a feature-rich extension that helps you to undo a cancelled order easily. This particular extension is designed to restore those orders that might have been cancelled by mistake. Similarly, multiple purchase requests can also be restored with the help of this extension and will help you to get back to the original state. Apart from this, the Bulk operation will be added to the orders grid, this means that the order that has been cancelled accidentally can be restored so you don't need to input any key for this just have to click the cancel button.