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THE FEUTEX TOOLKIT

JSON to Excel XLSX Converter

Turn an array of JSON objects into a real XLSX workbook with header columns, preserved primitive types and nested values stored as JSON text.

Spreadsheets workspace● Runs in your browser
01 Your input
02 Your result

How to use this tool

  1. Paste an array of JSON objects or open a JSON text file.
  2. Run the converter; keys across records become the header columns.
  3. Download the genuine XLSX workbook and open it in your spreadsheet application.

Try this example

[{"name":"Ada","id":"00123","score":98,"active":true},{"name":"Grace","id":"00124","score":95,"active":false}]

Accuracy and scope

Up to 50,000 records and 200 distinct columns, subject to the shared 2-million-character input limit. Nested objects/arrays are serialized as JSON strings. Null and missing fields become empty cells. Strings remain text, including values beginning with an equals sign. Input object keys must fit spreadsheet column limits.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.