Work with MARC files, privately.

Choose a tool, load ISO 2709 .mrc files or a ZIP, make your changes, then download a new MARC or MARCXML file. Files are processed in this browser and are never uploaded or retained.

Merge MARC records

Records are kept in their original order. Duplicate records are retained.

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↑Choose MARC files or a ZIPDrop files here, or click to browse. Every file inside a ZIP is treated as a MARC file, regardless of its filename extension.

Duplicate handling

Choose what happens when more than one source file describes the same title.

Remove duplicate bibliographic records

Download format

Load one or more MARC files to begin.

Designed for practical Koha cleanup

Use 952$a for home branch, 952$b for holding branch, 952$y for item type, and 952$p for barcode.
Custom fields are supported: enter a three-character MARC tag and a one-character subfield code.
Use a copy of your source file and test the resulting MARC before importing it into production.

Work with MARC files, privately.

Merge MARC records

Duplicate handling

Changes to apply

Designed for practical Koha cleanup