Split Your Klaviyo List
Split your CSV files into random groups with custom ratios
100% client-side processing - your data never leaves your browser
Upload Your CSV
Drag and drop your CSV file here, or
CSV files only
How It Works
1
Upload Your List
Drop your CSV file with email contacts from Klaviyo
2
Configure Your Split
Choose how many groups (2-10) and set your holdout percentage
3
Download Split Files
Get a ZIP file with all your segmented lists ready for upload
Example Split Preview:
Group 1-4
22.5% each
Holdout Group
10.0%
Privacy First: All processing happens in your browser. No data is uploaded to any server.
Perfect for splitting email lists, customer data, or any CSV for A/B testing and campaigns.