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.

How to Convert JSON to CSV

Turn a JSON array into a clean CSV file in your browser — correct escaping, UTF-8, and one row per object, with no upload.

CSV is the most portable way to share tabular data. Here is how to convert a JSON array into a well-formed CSV file without writing code.

Why CSV

CSV opens in any spreadsheet app, text editor, or database import tool. It is plain text, diffs cleanly, and is ideal when you need a single table that travels anywhere.

How the conversion works

Each object in a JSON array becomes one CSV row. Nested objects are flattened into dot-path columns (for example customer.contact.email), so every leaf value gets its own column. Fields appear in first-seen order across all rows.

Correct escaping

Values containing commas, double quotes, or newlines are wrapped in quotes and inner quotes are doubled, so nothing breaks a parser. Output is UTF-8, including non-Latin text.

One table at a time

CSV holds a single table. If your JSON contains several arrays, export each tab as its own CSV, or use XLSX to bundle them into one file. Nested arrays are written to a cell as a JSON string rather than expanded.