Spreadsheet converter

Browser Spreadsheet Converter - XLSX, ODS and CSV Tools

Convert XLSX, ODS, CSV and JSON spreadsheet data locally in your browser for private tabular workflows.

Browse 4 tools Privacy-first converters

Local converter directory

Choose a browser-supported tool.

4 tools

Spreadsheet tools read the first sheet or flat records and create browser-generated CSV, JSON or XLSX output without uploading the workbook.

Spreadsheets

Convert XLSX to CSV

Convert the first XLSX sheet to CSV locally.

CSV

Spreadsheets

Convert XLSX to JSON

Convert the first XLSX sheet to JSON records locally.

JSON

Spreadsheets

Convert CSV to XLSX

Convert CSV rows into a simple XLSX workbook.

XLSX

Spreadsheets

Convert JSON to XLSX

Convert flat JSON records into a simple XLSX workbook.

XLSX

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These converter links are plain HTML links, so people and crawlers can reach the same browser-only tools. Unsupported formats are not shown as fake choices.

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xlsx to csv converterxlsx to json convertercsv to xlsx converterbrowser spreadsheet converter