How to Split a Large CSV File Into Smaller Files
Published September 17, 2026 · 2 min read
A CSV that's too large for a specific import tool, or that you just want to break into more manageable chunks, can be split automatically — by a fixed number of rows per file, or into a specific number of roughly equal files.
Try CSV SplitterSteps
- 1
Open the CSV Splitter tool
Go to the CSV splitter.
- 2
Upload your CSV
Choose the large file to break apart.
- 3
Choose how to split it
Set rows per file, or a target number of output files.
- 4
Download the parts
Every part, each with the header row repeated, is bundled into a ZIP file.
Frequently asked questions
Yes — each output file includes the original header row, so every part remains a valid, independently usable CSV.
Yes — switch to "number of files" mode and the tool calculates the row count per file automatically to hit your target file count.
Yes — use the CSV Merger tool to recombine them later if needed.
Because splitting happens locally, breaking apart a large, sensitive dataset never means uploading the whole file to do it.