How are arrays inside JSON handled?

Arrays nested inside objects are serialized as a JSON string in the CSV cell to preserve the data without losing information.

Does it work with large JSON files?

Yes. The conversion runs entirely in your browser using JavaScript, so it handles files up to several MB without any server upload.

Is my data sent to a server?

No. Conversion happens locally in your browser. Your JSON never leaves your device.

Can I import the output into Excel or Google Sheets?

Yes. Comma-delimited output imports directly into Excel and Google Sheets. Use Tab delimiter if your data contains commas.

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JSON to CSV Converter

Convert JSON arrays to spreadsheet-ready CSV in seconds. Handles nested objects, custom delimiters, and automatic header detection. Runs entirely in your browser.

Paste your JSON

Include headers

CSV output

How the converter works

From JSON array to spreadsheet-ready CSV in three steps.

Paste your JSON

Paste a JSON array of objects into the input field. The tool also accepts a single object, which is treated as a one-row table. Nested objects are flattened with dot notation.

Configure options

Choose your delimiter: comma for most spreadsheets, tab for data that contains commas, or semicolon for European locale settings. Toggle header inclusion on or off.

Copy or download

Copy the CSV to clipboard or download a .csv file ready to open in Excel, Google Sheets, or any spreadsheet application. Stats show row and column counts.

Why use this JSON to CSV converter?

Handles real-world JSON that other converters get wrong.

Automatic header detection

Headers are derived from the union of all keys across every row, so even sparse datasets with missing fields produce a correct, complete CSV.

Nested object flattening

Nested objects like {"address": {"city": "Lagos"}} become a flat column named address.city. Arrays inside objects are serialized as JSON strings to preserve the data.

Proper CSV escaping

Values that contain the delimiter, quotes, or newlines are automatically double-quoted and escaped per RFC 4180. The output imports cleanly into every major spreadsheet tool.

Runs entirely in your browser

Conversion uses only JavaScript running locally. No files are uploaded to a server. Your data stays on your device no matter the file size.

Frequently asked questions

Everything you need to know about converting JSON to CSV.

Arrays of objects (most common), single objects, and nested objects. Nested fields are flattened with dot notation (e.g. address.city).

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