Can I split by column value?

Yes — one output file is created per unique value in the selected column.

Are headers included in each part?

Yes — the header row is repeated in every split file.

No. Everything runs locally in your browser.

Process files up to the browser memory limit.

Free plan: up to 20 parts. Pro: much higher limits.

Split a large CSV into smaller files by row count, column value, or file size. The safest way to process sensitive data with

Your files never leave your device. Processed locally. 100% private.

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Complete your task perfectly in just three straightforward steps.

Drop your CSV file.

Split by row count, by column value (one file per unique value), or by file size.

Download a ZIP of all split files.

Everything you need to know about the CSV Splitter.

Continue working with our suite of free data utilities.

Filter CSV rows by conditions on any column. Supports AND/OR logic. The safest way to process sensitive data with zero-upload

Transform wide CSV tables to long format. Convert column headers into row values. Processed entirely in your browser for 100%

Sort CSV rows by one or more columns in ascending or descending order. Fast, private, and secure browser-based tool with no s