Split Large CSV Files
Upload one or multiple CSV files and split them into smaller chunks. Powered by Web Workers — tested to 102M rows and 10 GB inputs.
How it works: Upload CSV file → choose split mode (by rows, size, or parts) → configure settings → download split files. Privacy first: Everything happens in your browser — your data never leaves your device.
Benchmark Performance
Real-world tested, production-ready
~260K rows/sec
102M rows
View full benchmark →