Document Converters

JSON to Excel Converter

Convert a JSON array of objects into a proper Excel workbook with one click. Column headers are derived from object keys, values are written to cells with correct types, and the resulting .xlsx file opens natively in Microsoft Excel, Google Sheets, Apple Numbers, and LibreOffice Calc.

File processed locally No sign-up required Instant download
Text input Excel download Browser-only

Input

JSON array

Text
JSON array
Conversion options

Document processing runs entirely in your browser; files never leave your device

Features

  • Converts a JSON array of objects to a formatted .xlsx workbook
  • Object keys become styled header row in the first sheet
  • Numbers, strings, booleans, and nulls map to correct Excel cell types
  • Configurable sheet name
  • All keys from all objects collected as columns; missing values produce blank cells
  • Real .xlsx binary file, not a CSV in disguise
  • All processing runs locally; JSON never leaves your browser

How to use it

  1. Paste a JSON array of objects into the input panel.
  2. Set a sheet name in the Options field if needed.
  3. Click Convert. The .xlsx file is generated in your browser.
  4. Click Download .xlsx and open the file in Excel, Google Sheets, or LibreOffice.

Use cases

  • Exporting API response data to an Excel workbook for review or sharing
  • Converting JSON database exports to spreadsheets for non-technical stakeholders
  • Building Excel reports from JSON configuration or log data
  • Turning JSON test fixtures into a spreadsheet for QA review

Limitations

  • Nested objects and arrays inside values are serialized as JSON text strings.
  • Only the first worksheet is created; multi-sheet workbooks are not currently supported.
  • Files with tens of thousands of rows may be slow on older devices.
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Questions & answers

Frequently asked

Does the output open correctly in Excel?

Yes. The file is generated as a valid Open XML .xlsx file using the same format Microsoft Excel writes. It opens without conversion warnings in Excel 2007 and later, Google Sheets, and LibreOffice Calc.

Are numbers stored as numbers or text?

Numbers in the JSON array are written as numeric cells so formulas and sorting work correctly in Excel. Strings, booleans, and null are written as their natural Excel types.

Is my JSON uploaded to a server?

Your file or text is processed in your browser and is not uploaded.

What if different objects have different keys?

All unique keys from all objects are collected as column headers. Objects missing a key produce a blank cell in that column.