Secure CSV Splitter

Split large CSVs by row count or by size. Files are processed entirely in your browser and never uploaded to any server.

1. Choose a CSV

Drop a CSV here or click to pick

2. Configure

Separator

Detected columns: —

Split mode

By number of rows By size (MB)

Rows per split

MB per split

Repeat header row in every split

Output

Choose a file and configure split options to begin.

100% client-side · CSV only · Max 100 MB