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Converters

Excel to JSON Converter

Upload .xlsx or .xls files and convert spreadsheet data into structured JSON right in your browser.

Runs entirely in your browser — your data never leaves your device.

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How to use this tool

  1. 1Upload your .xlsx or .xls file (it never leaves your browser).
  2. 2Pick the sheet and confirm the header row.
  3. 3Copy or download the JSON output.

Frequently asked questions

Is my spreadsheet uploaded anywhere?
No. The file is read locally in your browser with SheetJS. Nothing is sent to a server.
Can I choose a specific sheet?
Yes. If your workbook has multiple sheets, you can select which one to convert.
Is my data uploaded to a server?
No. Every tool on JSONPost runs entirely in your browser using JavaScript. Your JSON never leaves your device, so it is safe to use with private or sensitive data.

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