Free Online CSV Tools
View, edit, convert, and manipulate CSV files directly in your browser. No upload to servers, completely private.
Drop your file here or click to upload
Supports CSV, TSV, Excel files up to 100MB
CSV Viewer & Editor
Convert CSV
CSV → Excel
Convert CSV files to Excel format (.xlsx)
Excel → CSV
Convert Excel files (.xlsx, .xls) to CSV format
TSV → CSV
Convert TSV (tab-separated) files to CSV format
CSV → TSV
Convert CSV files to TSV (tab-separated) format
XML → CSV
Convert XML files to CSV format with element mapping
CSV → XML
Convert CSV files to XML format
CSV → JSON
Convert CSV files to JSON format
JSON → CSV
Convert JSON arrays to CSV format
Manipulate CSV
Splitter
Split large CSV files into smaller parts
Merger
Merge multiple CSV files into one
Compare
Compare two CSV files and highlight differences
Filter
Filter CSV rows based on conditions
Sort
Sort CSV data by one or more columns
Dedupe
Remove duplicate rows from CSV files
Transpose
Swap rows and columns in CSV files
Reorder
Reorder and select columns in CSV files
Geo & Mapping
Why Use CSVTool.io?
100% Private
Your files never leave your browser. All processing happens locally on your device.
Lightning Fast
No upload delays. Process files instantly with support for large files up to 100MB.
No Account Required
Start using any tool immediately. No signup, no login, no email required.