I don't know about a Python library or json converter. But MarcEdit can do it. Steve McDonald [log in to unmask] -----Original Message----- From: Code for Libraries <[log in to unmask]> On Behalf Of Goodwin, Shawn Sent: Monday, March 4, 2019 3:03 PM To: [log in to unmask] Subject: [CODE4LIB] MARC21 to MODS Hi All, I was looking at this website: https://www.loc.gov/standards/mods/mods-mapping.html#mapping Is there a python library (or even just a JSON file) that transforms MARC to MODS? -- Shawn Goodwin Metadata Control Analyst | ATLA<http://www.atla.com/> 300 South Wacker Drive, Suite 2100 Chicago, IL 60606