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.

XLSX to JSON

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 browse

JSON output

How to use XLSX to JSON

Drop a spreadsheet file.
Pick the sheet, output format (objects vs arrays), and indent.
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.

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.

Related tools

XLSX to CSV
CSV ↔ JSON
JSON Formatter / Validator