I have used OpenRefine for a long time to refine / clean / manually process table data. But I can't find anything similar for NoSQL (JSON/JSON lines) data. I wrote an experimental Python library that mimics MongoDB as column-based, not document-based, NoSQL RDBMS, and I wrote a headless wrapper that allows manipulating columns/fields as you may do it using OpenRefine. It's highly experimental and not performance optimized yet. I am looking for feedback and strong critique.