Manual for Free Magento 1 to Magento 2 migration add-on for Improved Import and Export extension (
Free Magento 1 to Magento 2 migration add-on helps to move data from Magento 1 store to Magento 2, or from one Magento 2 instance to another. With the add-on you connect together databases of two stores, choose which entity you want to migrate, and hit ‘Run’ button.
THE ADD-ON IS NO LONGER SUPPORTED
The latest version NOW SUPPORTS MIGRATION FROM MAGENTO 2 TO MAGENTO 2 in addition to M1>M2.