How to Split CSV Files into Multiple Files?

Efficiently Split CSV Files into Multiple Parts: A Starter Guide

Splitting large CSV files into manageable pieces—whether for faster processing, organized data handling, or optimized workflows—can be done with a mix of manual, command-line, or programming methods. Here’s a breakdown:

Manual Splitting (Best for Small Files)

• Notepad++ / Text Editors
  Simply copy ranges of rows (e.g., 1–1000) into new files and save. Quick for tiny files

• Microsoft Excel
  Open your CSV, select rows, copy and paste into a new sheet, and save as a CSV. Repeat as needed.

• Google Sheets
  Upload your CSV, split by copying ranges to separate sheets, and export each as its own CSV

  Drawbacks: Manual methods are time-consuming, prone to human error, and struggle with very large files.

Automated Offline Tools (For Larger or Frequent Tasks)

• Data. olllo (Free, Desktop App)
  Split files by size, number of files, or column values with a user-friendly interface. Handles extremely large files (80 GB+) quickly and offline.