Convert JSON to CSV Online Free — No Upload
Turn JSON arrays into clean CSV entirely in your browser. Supports arrays of objects or arrays, nested values serialized safely, proper RFC 4180 quoting. No upload, no signup, no limits.
Drop your file here — or click to browse
Read and processed locally on your device · never uploaded
How it works
- Paste your JSON below or drop a .json file onto the workbench.
- Click Convert — the shape is detected automatically.
- Download the CSV or copy it to your clipboard.
Frequently asked questions
What JSON shapes are supported?
Arrays of objects ([{"a":1},{"a":2}]) produce standard CSV columns; arrays of arrays export as-is. All union keys across objects become columns.
How are nested objects handled?
Nested objects and arrays are serialized as JSON strings inside their cell and properly quoted, so nothing corrupts the CSV structure.
Do leading zeros survive?
Yes — values stay exactly as they appear in your JSON. A SKU "00123" exports as "00123".
Is anything uploaded?
No. Paste or load your JSON and conversion happens in your browser with zero network requests — verifiable in DevTools.