CSV Splitter & File Divider
Split large CSV files into smaller chunks by rows, file size, or column values. Process gigabyte files with smart splitting, header preservation, and batch downloads—all locally in your browser.
How It Works
Upload or Paste CSV Data
Import your large CSV file by dragging and dropping, browsing files, or pasting data directly. Support for files up to 2GB with automatic delimiter detection for comma, semicolon, tab, and pipe separators. Real-time file size and row count analysis.
Configure Split Settings
Choose your splitting method: by row count (equal-sized files), by file size (size-based chunks), or by column values (category-based splits). Set header preservation, custom filename patterns, and output format preferences.
Preview Split Results
View a real-time preview of how your CSV will be split before processing. See file count, row distribution, estimated sizes, and sample data from each split. Adjust settings until the split meets your requirements.
Download Split Files
Download individual CSV files or get all splits in a single ZIP archive. Each file maintains proper CSV formatting with optional header preservation. Bulk download for efficient file management and distribution.
Problems It Solves
Problem
Large CSV files exceed spreadsheet application limits and email attachment size restrictions, making data sharing and analysis impossible across teams and systems.
Solution
Smart CSV splitting breaks large files into manageable chunks that fit within application limits while preserving data integrity, headers, and proper formatting for seamless workflow integration.
Problem
Processing massive datasets in single files causes memory issues, browser crashes, and poor performance when loading data into analysis tools or databases.
Solution
Memory-efficient browser-based splitting processes files in chunks, preventing crashes while creating optimally-sized files for fast loading into databases, BI tools, and analysis platforms.
Problem
Organizing data by categories, regions, or time periods manually is time-consuming and error-prone when working with mixed datasets that need separation for different teams or purposes.
Solution
Column-based splitting automatically separates data by unique values, creating organized files for each category while maintaining consistent structure and eliminating manual data sorting errors.
Why Choose This Tool
Smart Splitting Algorithms
Advanced splitting logic handles complex CSV structures with quoted fields, embedded commas, and multi-line content. Intelligent row distribution ensures balanced file sizes while preserving data relationships.
Zero Data Upload Required
Complete privacy protection with local browser processing. No server uploads, no data retention, no privacy concerns. Process sensitive financial, medical, or personal data with complete confidence.
Professional Output Quality
Industry-standard CSV formatting with proper quoting, escaping, and header management. Compatible with Excel, Google Sheets, databases, and data analysis tools. RFC 4180 compliant output.
Massive File Support
Handle gigabyte-sized CSV files with optimized memory usage and streaming processing. Progressive splitting prevents browser crashes while maintaining high performance on large datasets.
Frequently Asked Questions
What is the maximum file size I can split?
Will headers be preserved in split files?
Can I split files with different delimiters?
How does column-based splitting work?
Is my data secure when using this tool?
Can I download all split files at once?
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