Will the column header be duplicated in each chunk?

Yes! When "First row is header" is enabled, every split file gets the exact same header row at the top.

File 100% Client-Side

Split CSV

Split massive CSV files into smaller chunks by row count and download as ZIP.

Zero Upload

Never leaves browser

Instant Speed

WASM accelerated

or click to browse from your device

Preserves original header row in every split file

Custom row split limit (500, 1000, 5000+ rows)

Bundles all pieces into a single ZIP archive

100% private in-browser file streaming

Simple Workflow

Get results in three quick steps without any learning curve.

Upload the large CSV dataset you need to partition.

Select how many rows each resulting CSV should contain.

Get all split CSV files in one organized ZIP download.

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