Does the header row get included in every split file?

Yes, each output file includes the header row so it remains a valid, self-contained CSV on its own.

How do I choose the right row count per file?

Base it on whatever limit you're working around — an import tool's row cap, a file size target, or just a manageable chunk size for review.

Will rows ever be split in the middle?

No, splitting always happens on complete row boundaries — you'll never get a partial row across two files.

Does CSV Splitter upload my files to a server?

No. CSV Splitter runs entirely in your browser using on-device processing, your files never leave your device.

CSV Splitter

Split a large CSV file into smaller files by row count.

Runs in your browser

CSV input

Rows per fileFirst row is a header

About this tool

A single massive CSV export — hundreds of thousands of rows — can be unwieldy to open, email or process in one piece, especially if the destination system has its own row limits per import. This tool splits a large CSV into smaller files by a row count you choose, producing manageable chunks that are easier to work with individually.

Frequently asked questions

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