About Merge CSV Files
Merge up to 20 local CSV files, align named columns to the first file, preview the result, and choose the output delimiter.
CSV Merge combines up to 20 local files. With headers enabled, it matches columns by unique header name and reorders rows to the first file’s column order before export.
How to use it
- Select two or more CSV files in merge order.
- Choose delimiter and header behavior.
- Merge, preview, and download the combined CSV.
Common use cases
- Combine monthly exports with the same schema.
- Join batches produced by several offices or systems.
- Consolidate sharded CSV downloads before analysis.
Worked example
Combine twelve monthly exports even when one file lists the same headers in a different order.
Limitations and responsible use
- Header names must be unique and every file must contain the same set of columns.
- Merging does not remove duplicates, reconcile types, or resolve conflicting records.
- Combined input is limited to 60 MB and still depends on available browser memory.
Frequently asked questions
Can files use a different column order?
Yes when headers are enabled; rows are reordered to match the first file’s headers.
Are duplicate rows removed automatically?
No. Use CSV Deduplicate afterward with an intentional column key.