All Tools
27 privacy-first tools for CSV and Excel processing. All work entirely in your browser.
Split Large CSV Files
Upload one or multiple CSV files and split them into smaller chunks. Powered by Web Workers for files up to 10M+ rows.
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
351K rows/sec
10M+ rows
View full benchmark →