Often the biggest overhead of migrating or upgrading an e-commerce website comes in the guise of attributes.
With this extension, you can easily solve the issue. Using this extension will not only save you loads of time but will also minimize the risks of incompatibility, as it will import/export not only the attributes but also the associated values. This extension works with all kinds of catalogue input types, so you don't have to check twice whether it is compatible with your store or not.
For more info:- https://marketplace.magento.com/dotsquares-attributes.html
