JSON can be stored as DB2 CLOB data.
DBBlobEditor can help you to store JSON as DB2 CLOB data:
Batch import JSON files into DB2 CLOB
Batch export DB2 CLOB to JSON files
Convert your data online, free
Free in-browser converters for CSV, Excel, JSON, XML and SQL: Withdata Online Data Conversion. Large files, batch conversion or scheduling? See the offline desktop apps, or browse all data conversion tools.