CSV Toolkit
A powerful collection of tools for processing, transforming, and analyzing CSV data. All processing happens in your browser for maximum privacy and speed.
JSON to CSV
Convert JSON files to CSV format with smart column detection and array flattening.
Split CSV
Split large CSV files into smaller chunks with customizable row limits.
Combine CSVs
Merge multiple CSV files with intelligent column mapping and duplicate removal.
Merge Side-by-Side
VLOOKUP-style merging using key columns to combine related data.
Join on Column
Database-style joins with Inner, Left, Right, and Outer join options.
VLOOKUP
Excel-style lookup operations with multiple return columns and match types.
Remove Duplicates
Eliminate duplicate rows with configurable matching criteria.
Remove Blank Columns
Clean up empty columns with customizable threshold settings.
Why Choose CSV Toolkit?
Privacy First
All processing happens in your browser. Your data never leaves your device.
Lightning Fast
Optimized for large files with efficient processing algorithms.
Easy to Use
Intuitive interface with step-by-step workflows and live previews.