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Free Research Tool

CSV List Splitter

Randomly split your participant lists into custom groups.

1

Upload your CSV

Drag & drop or click to select your file

2

Choose your settings

Pick number of groups and reserve percentage

3

Download your files

Get a ZIP with each group as a separate CSV

100% Private — Your data is never sent to any server. All processing happens locally in your browser. No data is shared with third parties.

Drop your CSV file here

or click to browse

Supports .csv files with 1M+ rows

When to Use This Tool

  • • Multi-wave studies: Divide participants for sequential data collection phases
  • • Work distribution: Evenly assign participants across multiple team members
  • • Project distribution: Randomly assign participants across multiple research teams
  • • Quality control: Reserve a holdout group for verification purposes

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