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JSON to XLSX converter

Open JSON data as an Excel workbook. Your files stay on this device.

Drop JSON files here Files, a whole folder or a ZIP. Nothing leaves your device.

How to convert JSON to XLSX

  1. Add your files. Drop JSON files anywhere on the page, or use Choose files. Folders and ZIP archives work too; every JSON inside is picked up.
  2. Check that XLSX is selected. XLSX is already chosen on this page. Other formats in the same row are one tap away if you change your mind.
  3. Adjust options if you need to. For workbooks with several sheets, choose every sheet or only the first.
  4. Convert and download. Press Convert. Each file shows its progress, then a Download button. With several files, “Download all” gives you a single ZIP.

What happens to your JSON

The JSON is parsed, the list of records inside it is found, and nested fields are flattened into columns with dotted names such as address.city, so every record becomes one row.

Lists of simple values are joined with commas in one cell. If the JSON is not valid, the error message shows the parser’s explanation.

About JSON and XLSX

JSON: JSON is a text format for structured data used by almost every web API and app.

XLSX: XLSX is the Microsoft Excel workbook format, which can hold several sheets, formulas and formatting.

Questions

Is my JSON file uploaded anywhere?

No. The conversion runs inside this browser tab using code served by this site, and the XLSX is created on your device. You can even disconnect from the internet once the page and its converter have loaded.

What happens to formulas and multiple sheets?

Formulas are saved as their calculated values. Multi-sheet workbooks keep every sheet in formats that support it; CSV, TSV, JSON and similar formats get one file per sheet, or a single object keyed by sheet name.

Can I convert several JSON files at once?

Yes. Drop as many JSON files as you like, a whole folder or a ZIP. They convert one after another, and “Download all” saves every XLSX in one ZIP that keeps your folder structure.

Is there a file size limit?

There is no fixed limit, because nothing is uploaded. The practical limit is your device’s memory: a phone may struggle with very large files that a laptop converts easily.