The output produced by gron looks quite clean to me. You just write your file as if it was a list of js variable assignments. allowed-downtime[0][0] = 202

The output produced by gron looks quite clean to me. You just write your file as if it was a list of js variable assignments. allowed-downtime[0][0] = 20230523170000Z allowed-downtime[0][1] = 20230523170500Z allowed-downtime[1][0] = ... or if you absolutely want the names, you can make a "list of dictionaries": allowed-downtime[0].start = ...