This is a free and open-source (Windows-only) tool to migrate a LastPass csv export to a format supported by 1Password for import.
It was developed in light of the author's discovery of a number of critical security issues in LastPass infrastructure that drove him to migrate to an alternative.
As of 2022, 1Password has released their own (closed-source) migration tool for previous LastPass users, which you may prefer to use instead.
For more info on why this tool exists, how it works, and how to use it, please see the accompanying release article.
You can download a pre-built (and Microsoft Authenticode-signed) version of this project from the official download page.
This utility is released under the MIT public license by its developer, Mahmoud Al-Qudsi of NeoSmart Technologies. Copyright is retained by NeoSmart Technologies, 2017-2022.