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Free · No signup · Private — runs in your browser

Combine CSV Files

Stack several CSV files into one — rows are appended in order and a repeated header row is dropped automatically. Fast, private and free, right in your browser.

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How it works

1Add your filesDrag two or more .csv files onto the box at once.
2We combine themRows are appended in order; a header row matching the first file is skipped.
3Download one CSVDownload a single combined .csv with all the rows.

Frequently asked questions

Do my files need the same columns?

For best results yes — matching columns line up cleanly. Mismatched files are still stacked, in order.

Are duplicate header rows removed?

Yes — if a file starts with the same header as the first file, that header line is skipped.

Are my files uploaded?

No — the combine runs entirely in your browser.

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