KIM-EDN encoder and decoder embraces a subset of edn https://openkim.org/doc/schema/edn-format as a standard data format. The primary purpose of this data format choice is to serve as a notational superset to JSON with the enhancements being that it (1) allows for comments and (2) treats commas as whitespace enabling easier templating. KIM-EDN encoder and decoder works for Python 3.6+. It is pure Python code with no dependencies.