Local browser tool

XLSX to JSON

Export every worksheet as row objects or arrays without evaluating formulas.

● Selected files stay on this device

Choose XLSX workbook

Drop a file here or browse your device

JSON row form

Steps

How to use XLSX to JSON

Choose a workbook.
Choose objects using row one as keys or arrays retaining all rows.
Download one JSON or a ZIP.

Worked example

Create API seed data

A sheet begins id,name and contains 001,Ada and 002,Zoë.

Result: Object mode produces id and name keys without calculating formulas.

Supported

What this tool handles

Every worksheet
Object and array forms
Strings, numbers, booleans, dates and inert formula text

Not supported

Important limitations

Running formulas
Cell styles
External links

Operational limits

XLSX only
Up to 2,000,000 cells per worksheet
Styles, charts and macros are omitted

Troubleshooting

Common problems

Keys have suffixes

Duplicate headings receive _2, _3 and so on.

Formula cells begin with =

Formulas are represented as inert JSON strings.

Questions

XLSX to JSON FAQ

Which row supplies keys?

Object mode uses row one; blank headings become column_1 and so on.

Are formulas recalculated?

No Excel calculation engine runs.

Learn before converting

Practical guides for this task

How to preserve leading zeros in CSV and ExcelKeep postcodes, account numbers and identifiers from being silently converted to numbers.CSV vs XLSX: what survives conversion?Understand worksheets, formulas, formatting, delimiters and text safety.