Split a CSV or Excel table into smaller files

Splitting a table is useful when a file is too large for an import, when each team needs only its own records, or when one column naturally defines separate outputs.

Split by row count

For size limits, divide a CSV into chunks containing a fixed number of rows. CSV Splitter is designed for this kind of operation.

Each output should retain the header row so that it remains independently usable.

Split by a column value

An Excel workbook may need one output per region, department or category. Split Excel by column groups rows according to the chosen field.

If you only need one subset rather than every group, CSV Filter may be simpler.

Keep naming predictable

Output names should make the split rule visible: region, date, sequence number or other meaningful value.

If the files will later be merged again, keep the same schema across all parts. The guide Merge CSV or Excel files without misaligning columns explains why aligned headers matter.