CSV Splitter – Split CSV into Multiple Files Online
How to split a CSV file into multiple files online
- Upload a CSV file by dragging it into the drop area or clicking to choose it, or paste CSV text into the editor.
- Choose a split mode: fixed rows per file, target number of files, or split by column value.
- Adjust parameters such as rows per file or number of files. For column split, select the column to group by.
- Click the split button and download each generated CSV part. The header row is kept in every part when you mark the first row as header.
Privacy
All CSV splitting happens locally in your browser. Your CSV file never leaves your device and no data is uploaded to any server.
CSV Splitter FAQ
Can this CSV splitter handle large CSV files?
It can handle reasonably large CSV files, but it still runs inside your browser, so very large files are limited by memory and CPU. If splitting feels slow, try splitting the CSV in several passes or reducing rows per file.
Will each split CSV file keep the header row?
If you check the option that the first row is header, the tool keeps the header row in every split CSV file so that each part can be opened independently.
How does split by column value work?
You pick a column and the tool groups rows by that column value. Each distinct value becomes one CSV file containing the header row and matching rows.
Is my CSV uploaded or stored anywhere?
No. The CSV splitter runs fully in your browser. Files are processed in memory and never uploaded or stored on a server.