Free Spreadsheet Tools

Convert, clean, and compare your files online. All tools are free, require no signup, and process everything in your browser for complete privacy.

CSV to Excel Converter

Convert CSV files to Excel format (.xlsx) instantly

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Excel to CSV Converter

Convert Excel files (.xlsx, .xls) to CSV format

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JSON to CSV Converter

Convert JSON arrays and objects to CSV spreadsheets

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CSV to JSON Converter

Convert CSV files to clean JSON format

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Remove Duplicate Rows

Find and remove duplicate rows from Excel and CSV files

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Compare Two CSV Files

Quick comparison to find differences between CSV files

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