CSV File Splitter

How to use this tool

1. Choose a CSV file with a header row.
2. Set the maximum data rows per output file.
3. Download the split CSV files.

About CSV File Splitter

Use this CSV File Splitter for a quick result with clear validation and copyable output. It is designed to be simple on phones and desktops alike.

Using CSV File Splitter with the right inputs

Split a CSV file into smaller downloadable files without uploading it. Start by matching your task to the quantities and options shown below. The definitions of the inputs matter as much as the final number or transformed output; retain the original values so that you can repeat or check the result.

Inputs and options explained

• CSV file: choose a local source file and keep the original. The file selector accepts text/csv, .csv. Check that the file contents match the intended format; renaming an extension does not convert a file.
• Data rows per output file: Enter the numeric value for this quantity using the units or scale shown in the label. The form indicates a minimum of 1 and a maximum of 10000.

A practical first-file check

Make a small test file containing the same kind of data as your real file. Keep a copy of the original, choose the settings above and run the operation. Compare the result with the changes you expected before processing the full document. File size, browser memory and the source format can affect whether a large input is usable.

Interpretation and limitations

Check the delimiter, header row, quoted fields and line endings before processing. A comma inside a quoted field is data, not a column boundary. After conversion, compare row counts and identifiers, especially values with leading zeroes, dates and long digit strings.

Before you use the output

• Choose the intended action: Process CSV file. Re-run the operation after changing an input or mode so that you are checking the updated result.
• Read the result label and any accompanying explanation. Keep the input values or source file with the output so that a later comparison uses the same assumptions.
• If a result looks unexpected, check units, separators and selected options first. Try a smaller example you can verify rather than repeatedly changing several settings at once.

Questions or a result that needs checking?

If you find a discrepancy, report a problem with CSV File Splitter. Include a non-sensitive example, the selected options, the result you expected and the result shown. This makes the issue easier to reproduce. See About & privacy for how the site handles tool inputs.