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Free Online JSON to CSV Converter

Convert JSON to CSV format instantly. Handles nested objects. Works offline.

JSON Input
or

Click to upload or drag & drop a .json file

Or paste JSON
CSV Output
Enter JSON to convert

How the JSON to CSV Converter Works

Our converter transforms JSON arrays and objects into properly formatted CSV files. It automatically handles nested objects by flattening them with dot notation, making complex JSON structures spreadsheet-ready.

Automatic Flattening

Nested objects are flattened automatically. For example, a nested address object becomes separate columns like "address.city" and "address.country", preserving all your data in a flat structure.

Privacy First

Conversion does not upload JSON to a SimpleTaskTools endpoint. Review the CSV before opening it in a spreadsheet because cells beginning with formula characters may be interpreted by that application.

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What this tool does

Export a JSON array as delimited rows.

How to use it

Paste an array of records, choose whether to include headers, and inspect the comma-delimited CSV before downloading.

Worked example

[{"name":"Ada","age":36}] produces a name,age header and an Ada,36 row in comma-delimited mode.

Limitations and checks

Nested values and inconsistent record shapes need review. CSV has no native data types; spreadsheet apps may reinterpret dates, leading zeros or formula-like cells.

How your data is processed

The operation runs in your browser. Copy and download actions use your device. Where Save work is offered, a local copy is stored; eligible work can sync only under your enabled account settings. See Privacy for site analytics and storage details.

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