CSV Splitter
Split large CSV files into smaller chunks by row count — browser-based, no signup required.
Drop your CSV file here
or click to browse
Upload a file to see the estimate
How to split a CSV file
- Upload your CSV file by clicking the drop zone or dragging the file onto it.
- Set the number of rows you want per output file using the slider.
- Click Split CSV — each chunk is prepared in your browser.
- Download individual files or click Download All to get them all at once.
Why split large CSV files?
Many tools have import row limits — email platforms, CRMs, and databases often cap batch imports at 1,000–10,000 rows. Splitting a large CSV lets you import data in batches without manual copy-pasting. The header row is automatically included in every output file.
Privacy — your data stays local
Your CSV file is read and split entirely in your browser. Nothing is uploaded to a server.
Frequently Asked Questions
Is the header row included in every split file?
Yes. The first row (header) is copied to the top of every output file so each chunk is a valid standalone CSV.
What is the minimum and maximum rows per file?
You can set between 100 and 50,000 rows per output file using the slider.
Can I download all files at once?
Yes — the Download All button triggers sequential downloads for all chunks.
Is there a limit on the input file size?
No hard limit. It depends on available browser memory. Most files under 200 MB work without issues.