Convert JSON to XLSX
Convert JSON to XLSX free in your browser. No upload, no signup, no watermark. Files stay on your device.
drop a .json file
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how to convert json to xlsx
Drop your JSON file
Drag your JSON file into the drop zone above, or click the box to pick a file from your computer or phone. The browser reads the file directly — nothing uploads.
Click Convert
The page runs SheetJS on your device to decode the JavaScript Object Notation and encode it as Microsoft Excel workbook. Most conversions finish in a few seconds; large or codec-heavy files (RAW, video) can take longer.
Download the XLSX file
When the conversion finishes, the XLSX file is ready to download. Save it anywhere on your device.
FAQ
common questions
What JSON structure does the converter expect?
An array of objects works best — each object becomes one row, with the object keys becoming column headers. Example: `[{name: 'Alice', age: 30}, {name: 'Bob', age: 25}]` becomes a spreadsheet with name and age columns and two data rows. The converter also accepts a top-level object with multiple array properties — each becomes its own sheet in the Excel workbook.
How are nested objects handled?
Flattened to dot-notation columns when possible. A row like `{name: 'Alice', address: {city: 'NYC', zip: '10001'}}` becomes columns 'name', 'address.city', 'address.zip'. Deeply nested or array-valued fields may not have clean column representations and can come through as JSON-stringified text in a single cell.
Will data types be preserved?
Yes — that's a key win over CSV. JSON numbers (no quotes) become Excel numbers (sortable, usable in formulas). JSON booleans become Excel TRUE/FALSE. JSON null becomes empty cells. Strings stay as text. Dates require some convention (JSON has no date type) — ISO 8601 date strings like '2024-01-15' parse as Excel dates if Excel recognises the format.
What if my JSON has multiple top-level arrays?
Each array becomes its own sheet in the workbook, named after the JSON key. So `{users: [...], orders: [...]}` produces an Excel file with two sheets: 'users' and 'orders'. This preserves logical separation that would be lost in flat CSV.
Why convert JSON to Excel?
Two common workflows: (a) handing API responses or database exports to business users who want to analyse them in Excel; (b) creating reports or pivot tables from structured data without writing code. JSON is the data interchange format; Excel is the analysis format. Conversion bridges the two.