CSV Split
See break large CSVs into smaller chunks. Split by row count or maximum file size.
Last updated: April 30, 2026
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CSV Split — No Uploads Required
Manage oversized CSV files by breaking them into smaller segments. Many systems have limits on the number of rows or file size they can import. Our CSV Split tool allows you to divide a large file into multiple smaller ones while automatically including the header row in every chunk. You can split by a specific row count (e.g., every 5,000 rows) or target a specific file size (e.g., every 10MB). High-performance local processing ensures even massive files are split in seconds, and you can download all parts in one convenient ZIP archive.
Why This Tool Exists
What makes this useful — and why I built it this way.
System Compatibility: Meet the import limits of Salesforce, Shopify, and other platforms.
Easier Sharing: Break huge files into segments that can be sent via email or chat.
Performance: Smaller files open and process much faster in spreadsheet software.
Data Integrity: Every split file remains a valid CSV with its original headers.
Security: Process large internal databases locally without cloud exposure.
When You'd Use This
Real situations where this tool saves the day.
CRM Imports: Split a 50,000-row contact list into 5,000-row chunks for easier uploading.
Email Marketing: Divide a large subscriber list into segments for different campaigns.
Data Distribution: Break a master report into smaller files for different team members.
Database Migrations: Split large table exports into smaller files for faster SQL import.
Log Analysis: Break massive server logs into daily or hourly segments for easier review.
Using CSV Split
It's straightforward — here's how it works.
Upload the large CSV file you need to break down.
Choose your split method: 'By Row Count' or 'By File Size'.
Specify the chunk size (e.g., 1000 rows or 5MB).
Click 'Split' to trigger the local division process.
Download all the generated parts in a single ZIP file.
Questions People Ask
Honest answers about how this works.
Will every file have the header row?
Honestly? Yes, our tool ensures that the original header is correctly placed at the top of every generated file.
Is there any a limit on input file size?
Honestly? Our tool uses streaming where possible, but for very large files (500MB+), your browser's RAM will be the limit.
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