How to use Split CSV
Split a table into smaller files by row count.
- Choose a CSV, set rows per file, and process. Every part keeps the header and is included in the ZIP download.
- Process the selected files, then inspect the preview, dimensions or warnings.
- Download a new copy and check it before replacing or sharing the original.
How processing works
Data rows are partitioned into chunks of the size you choose. Every output chunk includes the original header row, which is not counted toward the chosen data-row limit.
A quick example
Split 12,000 rows into three files containing up to 5,000 rows each.
Assumptions, edge cases & limits
- A quoted newline inside a cell is parsed as part of the record, not a separate data row.
- Review all generated parts before deleting the original file.
- The split is based on data rows, not physical lines inside quoted fields.
Questions about Split CSV
Does the CSV header count toward rows per file?
No. A setting of 5000 means up to 5000 data records plus a header in each output. The final part can contain fewer records.
Will splitting break a quoted field containing a newline?
The parser splits logical CSV records rather than raw text lines. Properly quoted multiline cells remain within their record; malformed quoting can still require correction first.
Are my files or inputs uploaded?
Calculation and file processing run in your browser without a processing upload. Downloads go to your device. Choosing a next-step transfer creates a temporary local copy for that workflow. Region preferences are stored separately from tool inputs. See our privacy details.
Can I use this tool for free?
Yes. No signup, subscription or payment is required to use the tool or download its output. File tools have device and size limits; a smaller batch may work better on a phone.
A result or explanation needs correcting? Tell us the tool name and an example.