Convert Excel (XLSX) to JSON
Free online converter for Excel (XLSX) files. Structured data interchange format. Nothing to install, no watermark, and every file is deleted automatically.
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Upload a Excel (XLSX) file to convert it to JSON. Up to 3 files at once, 100 MB each.
Free · up to 3 files · 100 MB each · files deleted automatically after 1 hour.
About XLSX and JSON
Excel (XLSX) .xlsx
Excel's modern workbook format — zipped XML holding sheets, formulas, formatting and charts.
Good for
- Keeps live formulas, not just their results
- Multiple sheets, charts and conditional formatting
- The default in nearly every business
Trade-offs
- Formula compatibility varies between spreadsheet applications
- Heavier than CSV for plain tabular data
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
JSON .json
A structured text format for nested data. Unlike CSV it represents hierarchy, which is why nearly every web API speaks it.
Good for
- Represents nesting and lists, not just flat rows
- Parsed natively by essentially every language
- Readable, and precise about types
Trade-offs
- More verbose than CSV for plain tables
- Awkward to read in a spreadsheet without flattening
- No comments, and no native date type
application/json
XLSX and JSON side by side
| XLSX | JSON | |
|---|---|---|
| Compression | Zipped XML | None — plain text |
| Animation | No | No |
| Typically used for | Spreadsheets, financial models, reports | APIs, configuration, structured exports |
What changes when you convert XLSX to JSON
Rows become records
The first row is read as field names, and every row after it becomes one object keyed by those names. That gives you the array of records most APIs and scripts expect. A sheet whose real header does not sit in the first row will produce field names taken from whatever does — worth checking before you point code at the output.
Read directly, never opened
No spreadsheet application is involved in this conversion. The file is parsed in our own process and the data is written straight out, which is both faster than launching an office suite and safer: macros in a workbook are never in a position to run, because nothing here is capable of running them. It also means the output is exactly the data, with none of an office suite's opinions about formatting applied on the way through.
Formulas arrive as their results
What is read is the value each cell had last time the workbook was calculated, not the formula that produced it. That is almost always what you want from an export. It does mean the output is a snapshot: nothing in it recalculates, and a workbook saved without being recalculated will export whatever stale values it was holding.