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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