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JSON to Excel Converter — Download a Real .xlsx File

Paste JSON to generate a real, downloadable .xlsx file — not a renamed CSV — with nested objects flattened into columns, built entirely in your browser so your data never passes through a server in between.

How to use JSON to Excel

1. Paste your JSON.
2. Review the flattened column structure.
3. Download the generated .xlsx file.

Frequently asked questions

Is the output a real Excel file?

Yes — a genuine .xlsx file built in your browser, not a CSV with an .xlsx extension slapped on, so it opens correctly with proper formatting in Excel and Google Sheets.

Is my JSON uploaded to a server?

No. The file is generated entirely client-side and downloads directly from your browser.

How are deeply nested objects handled?

They are flattened into dot-notation columns, the same approach as the JSON to CSV converter, so no data is silently dropped.

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