CSV Splitter
Split a large CSV file into smaller chunks of N rows each. Header row optionally repeated in every chunk. Useful for batch processing, email attachment size limits, or chunking for parallel data import.
What powers the CSV Splitter
Configurable rows per chunk (100-10,000)
Optional header repeat in each chunk
Handles quoted multi-line values correctly
Per-chunk download or download all
file never uploaded
100MB max file size
Why the CSV Splitter is different
Browser-native
The CSV Splitter runs entirely in your browser. Input is processed locally — never uploaded, never logged, never cached anywhere outside your device.
No artificial limits
No daily quotas, no character ceilings, no "upgrade for more" walls. Every feature is the complete feature — the same on the first use as the thousandth.
Production-grade quality
Built to the same engineering bar as paid SaaS tools — accurate algorithms, audited logic, responsive design and accessibility-tested interactions.
Common use contexts
- Splitting bulk customer lists for batch import
- Working around email attachment size limits
- Distributing data to parallel processing workers
- Sharing subsets of a large dataset
Private and secure
Zero upload
All processing happens in your browser. Input is never transmitted, logged or cached.
Works offline
Once the page loads, the tool runs without an internet connection. No network calls happen during use.
No tracking
No accounts, no cookies for tool state. Only aggregate analytics count visits at the page level.