ConverterJSON to Excel Converter
Create an XLSX workbook from a predictable JSON table. Paste JSON or upload a .json file, validate the root array, inspect the resulting columns, and download one editable worksheet without executing the input.
Convert Your File
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Data preview
Supported Input
A .json file or pasted JSON array up to 5 MiB.
Generated Output
One editable .xlsx workbook containing one worksheet.
What This Conversion Preserves
- JSON strings, numbers, booleans, null positions, and Unicode text.
- First-seen key order for arrays of objects.
- Row order for arrays of arrays.
Important Format Limits
- The root value must be an array of objects or an array of arrays.
- Nested objects and arrays are stored as compact JSON text in one cell.
- Formula-like strings remain text and are not turned into executable spreadsheet formulas.
Preview tables show at most the first 100 rows and 50 columns. The downloaded result contains all validated data unless a documented hard limit stops conversion before export.
A Practical Example
Objects with different keys become one union of columns in first-seen order. A missing property becomes an empty cell, while a nested address object is stored as compact JSON text instead of being flattened unpredictably.
Browser Processing and File Safety
Conversion runs locally in a Web Worker so the interface can remain responsive while spreadsheet data is parsed. Converter247 does not send the selected file or pasted data to an API. Files stay in memory for the current page session and are released when you reset or leave the page.
Only XLSX workbooks are accepted for Excel input in this release. Workbook macros are not read or executed. Imported text is treated as data, including values that look like formulas. Large identifiers, leading-zero values, and high-precision numbers are preserved as text when exact numeric safety cannot be guaranteed.
Blank cells and unsupported workbook features are handled conservatively: the tool blocks unsafe over-limit inputs, reports formula cells without cached values, and avoids creating active formulas from CSV or JSON text.
Frequently Asked Questions
Use an array of objects or an array of arrays. A root object by itself is rejected with a clear message.
Nested arrays and objects are serialized as compact JSON text in the corresponding cell. They are not flattened automatically.
The tool creates a union of all discovered keys and leaves a blank cell where an object does not contain one of those keys.
No. User-provided strings are written as text cells, including values that begin with formula-like characters.
Yes. It is a standard XLSX workbook with one worksheet and can be edited in compatible spreadsheet software.
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