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XLSX to JSON Converter

Convert any Excel sheet to JSON — array of objects keyed by header row, or array of arrays with no header.

Drag a .xlsx file here or

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How to use XLSX to JSON

  1. Drop a spreadsheet file.
  2. Pick the sheet, output format (objects vs arrays), and indent.
  3. Copy the JSON or download as .json.

What is XLSX to JSON?

Useful for piping spreadsheet data into APIs, fixtures, or any system that prefers JSON. Pick the sheet, output format, and indentation. The 'array of objects' mode treats the first row as field names; 'array of arrays' preserves the raw cell grid.

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FAQ

What if cells have mixed types?
Cells export with the type SheetJS infers — numbers as numbers, dates as date objects, strings as strings. Empty cells are omitted from object output.
Is my Excel file uploaded to a server?
No. All conversion happens locally in your browser. Your Excel file is never uploaded—it's parsed entirely on your device.
What JSON structures can I generate?
Choose an array of objects (header row becomes keys) or an array of arrays (no header). Both options appear before you convert.

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Author

SC
Sarah Chen"The Data Whisperer"

Data Analyst & CSV Specialist

Sarah has spent more than a decade wrangling spreadsheets, debugging CSV exports, and teaching teams how to make data work for them. She previously led data-quality initiatives at a fintech unicorn, where she reduced reporting errors by 40 percent through automated validation pipelines. When she is not optimizing queries or writing about data tooling, you will find her mentoring junior analysts at local bootcamps and speaking at data literacy meetups.

📖 XLSX to JSON on Wikipedia·Office Tools on Wikipedia·XLSX to JSON on Britannica

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