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Marketing CSV Splitter
A large list. Manageable pieces.
Prepare smaller CSV files for your next import. Choose a row count, keep your headers and download the parts together with a simple file report.
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- 1Add files
- 2Review settings
- 3Save results
01Choose your contact file
02Smaller files. Same contact data.
Rows stay in their original order. Every part keeps the header when selected. Splitting never cleans, suppresses or removes contacts.
Choose your files or try the example. Review the detected columns before creating any exports.
How it works
- 01
Choose your CSV and indicate whether its first row contains column names.
- 02
Set the number of data rows per file. Check the expected file count; headers do not count toward the row limit.
- 03
Download the ZIP. Each part preserves row order and the chosen header setting. A report lists the number of data rows in each file.
First-version limits
One file up to 5 MB, 50,000 data rows and 100 columns; maximum 200 output CSV files. CSV/TXT/TSV only, not XLSX. This tool splits rows; it does not validate emails or change subscription status.
File contents are held in memory for this tool session, not saved to browser storage. Use Clear data or leave the tool to release them. Downloads remain on your device. Ordinary site cookie settings still apply; the toolkit adds no file-content analytics.
Open your browser. Get the job done.
No app to install. Save only the results you want to keep.