Excel, CSV & JSON Converter

Import an .xlsx or .csv spreadsheet and convert it to JSON, or convert a JSON object array to a downloadable CSV.

Choose an XLSX/CSV file or paste table data below.

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JSON / CSV Output

Formats and Limitations

All conversions run in your browser; files are not uploaded. XLSX reads common text, number, Boolean, and shared-string cells from the first worksheet. Formulas use cached values only. Excel date serials remain numbers; styles, formula recalculation, and worksheet selection are not supported. If your browser lacks native ZIP decompression, save the workbook as CSV first.

CSV import treats the first row as headers and keeps values as text. Duplicate headers are numbered. Nested values in object arrays are serialized as JSON strings when exported.

Related tools:JSON ↔ CSV JSON Table Preview JSON Formatter