MARCedit has a CLI: https://marcedit.reeset.net/cmarcedit-exe-using-the-command-line Looks like the `-xmltomarc` flag is what you want, though I've not used it for this purpose myself. Best, Eric On Tue, Aug 8, 2023 at 11:57 AM Eric Lease Morgan < [log in to unmask]> wrote: > I have a 500MB MARCXML file, and I want to create a corresponding MARC > file in communications format -- "standard" MARC. What command-line > utilities can do this sort of work? --Eric Morgan >