Free Online CSV Tools

Convert, clean, and transform CSV files instantly. No signup, no uploads — everything runs in your browser.

CSV to Excel Converter

Convert any CSV file to a clean .xlsx spreadsheet. Auto-cleans headers, trims whitespace, removes empty rows.

Remove duplicates, fix formatting, and clean messy CSV files in one click.

Convert CSV files to clean, structured JSON. Perfect for developers and APIs.

Combine multiple CSV files into one. Match columns automatically.

Split a large CSV into smaller files by rows or by a column value. Download as ZIP.

CSV to JSON, CSV Cleaner, CSV Merge, and more. Get notified when they launch.