Merge CSV

Combine multiple CSV files into one.

Drop CSV files here

Select two or more CSV files to merge into one. Up to 20 MB each.

Upload two to ten CSV files and download a single file with rows stacked in list order. The first non-empty header becomes the main header.

Limitations

Columns are not matched by meaning — align names, count and order beforehand. Each file up to 10 MB; large combined sets use more device memory.

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Split CSV

Split a CSV into smaller files by row count.

Remove CSV Duplicates

Remove duplicate CSV rows by full row or one column.

CSV to Excel

Convert CSV to an Excel XLSX workbook.

FAQ

Up to 10 CSV files at once.

CSV files are read and combined locally in the browser, without being sent to the server. The combined volume of several files can significantly affect the memory and speed of the device.