Split a CSV File Into Multiple Files on Windows

Windows doesn't include a built-in way to split a CSV file, so most people either turn to PowerShell scripts, which require some technical comfort, or open the file in Excel and copy rows out by hand, which is slow and error-prone once a file has more than a million rows.

Turbo Large Data Splitter was built specifically for Windows 10 and 11 as a straightforward alternative to both approaches. It installs like any other desktop application and handles the splitting through a simple interface, so there's no command line and no manual copy-pasting involved.

1. Download and install Turbo Large Data Splitter for Windows.
2. Launch the app and load your CSV file.
3. Select whether to split by row count or file size.
4. Enter the rows or size you want per output file.
5. Turn on header repetition if each file needs its own header row.
6. Click Split and find your files in the output folder.

• Native Windows 10 and 11 desktop application
• No PowerShell scripts or command-line steps required
• Split by row count or file size
• Handles CSV files far larger than Excel's row limit
• Runs offline with no internet connection needed
• One-time license, no subscription