Is my data uploaded anywhere?

No. All parsing, preview, and export happen locally in your browser. Your JSON is never sent to a server.

What is the file size limit?

5 MB per input. Larger inputs are rejected before parsing.

Are nested objects flattened?

Yes. Nested objects are flattened into dot-path columns such as userInfo.contact.email.

Are nested arrays expanded into new tables?

No. Arrays inside a row are written to a single cell as a JSON string and are not expanded.

What is the difference between CSV and XLSX?

CSV is a single-table text file. XLSX is a spreadsheet workbook; multiple tables can be exported as separate sheets in one file.

Is this a JSON to spreadsheet converter?

Yes. It turns JSON arrays into a downloadable spreadsheet in either CSV or XLSX format. CSV gives you a single universal table; XLSX can bundle several tables as sheets in one workbook. Everything is generated in your browser.

Convert JSON to a Spreadsheet (CSV & XLSX)

Turn any JSON array into a downloadable spreadsheet — CSV for portability or XLSX for multi-sheet workbooks, all in your browser.

When you have JSON and need a spreadsheet, you do not need a script or an online uploader. This guide shows how to go from raw JSON to a ready-to-open spreadsheet in seconds.

What counts as a spreadsheet here

A spreadsheet is any tabular file you can open in Excel, Google Sheets, Numbers, or a text editor. This tool produces both CSV (a universal single-table text file) and XLSX (a workbook that can hold several sheets). Either is a valid JSON to spreadsheet result.

From JSON to spreadsheet

Paste or upload your JSON. The tool finds every array, flattens nested objects into columns, and shows a live preview. Pick CSV for one table or XLSX to bundle multiple tables into one spreadsheet file.

Multiple arrays, one spreadsheet

If your JSON contains several arrays at different paths, "Download all (XLSX)" writes a single spreadsheet with one sheet per array — the closest equivalent to pasting each list into its own tab.

Private by default

Everything happens locally in your browser. Your JSON is never uploaded or stored, so converting sensitive data to a spreadsheet stays on your device.