Split large CSV files online free

Turn one oversized CSV into manageable files

1. 1

   Upload the large CSV you want to divide.

2. 2

   Choose rows per file for a row limit, maximum size for an MB limit, or number of parts when you want roughly even pieces.

3. 3

   Set the active limit and review the estimated file count.

4. 4

   Choose whether every part repeats the header row.

5. 5

   Run the split, verify the file count and total rows, then download one ZIP containing the ordered CSV parts.

Built for the real task

• Split by rows or file size
• Balanced target part count
• Quoted fields kept intact
• Single ZIP download

Common uses

• Split by rows or file size
• Balanced target part count
• Quoted fields kept intact
• Single ZIP download

How should I choose the split size?

Choose a row limit when each output should contain a predictable number of records, a size target when file size matters, or a target part count when you want roughly even pieces. A single unusually large row can exceed a size target because rows are never cut in half. Repeat the header when each part must open independently, and verify the total rows before downloading.