JSON to CSV Converter (Nested Objects)
Convert JavaScript Object Notation to Comma-Separated Values online. Free, runs in your browser — no upload, no signup. Flattens nested JSON objects into dotted columns like profile.age.
How to convert JSON to CSV
Paste your JSON data into the input box on the left, click Convert, and get CSV output on the right. Everything runs locally in your browser.
Example: JSON → CSV
Input (JSON)
[
{"name": "Alice", "profile": {"age": 30, "role": "admin"}},
{"name": "Bob", "profile": {"age": 25, "role": "user"}}
]Output (CSV)
name,profile.age,profile.role
Alice,30,admin
Bob,25,userAbout JSON and CSV
JSON (JavaScript Object Notation, .json) and
CSV (Comma-Separated Values, .csv) are common
structured data formats. This converter transforms JSON into CSV
entirely in your browser — no data is uploaded to any server.
Frequently asked questions
Is this JSON to CSV converter free?
Yes, completely free. All conversion happens in your browser, so your data never leaves your device.
Do I need to upload my .json file?
No. Paste the content directly. There is no server-side processing, no file upload, and no storage.
Is there a limit on data size?
It depends on your browser, but most machines handle tens of thousands of rows without issue. For very large files, performance may vary.