Split CSV File Online
Divide large CSV files into smaller files by row count or file count.
Drop your CSV file here
or click to browse from your computer
CSV, TSV, XLSX, TXT• Private in-browser processing
Private by Design — Your CSV Stays on Your Device
OnlineCSV processes your files entirely client-side using browser JavaScript. Your CSV contents are never uploaded to any server, database, or remote service.
No account requiredWorks offlineZero data transmission
How to Use Split CSV
1
Drop Large CSV
Select the large CSV file you want to split.
2
Define Chunk Size
Specify rows per file (e.g. 5,000 rows) or target file count.
3
Download Split Files
Download individual split files or save all parts in a ZIP archive.
Frequently Asked Questions
Are headers included in every split file?
Yes! The top header row is automatically copied to the beginning of every split file.