Tool World

CSV Merger

Merge multiple CSV files into one.

CSV Merger combines several CSV files in list order. Optionally keep a single header row from the first file.

Frequently Asked Questions

Does my data leave the browser?

Processing stays in your browser. Nothing is uploaded to ToolWorld servers.

Must columns match?

Rows are padded to the widest column count. Mismatched headers may need cleanup.

File order?

Files merge in the order shown — reorder before merging.