Convert JSON to CSV
Drop a JSON file containing an array of objects and get a CSV back — one row per object, one column per key. The conversion runs entirely in your browser, so the file never leaves your device.
About JSON to CSV
This converter works on a specific JSON shape: a top-level array of flat objects, where every element has the same keys and values are strings, numbers, or booleans. Each object becomes one CSV row; the key names from the first object become the column headers. If your JSON contains nested objects, arrays-as-values, or is not a top-level array, the converter will tell you clearly — those shapes don't map cleanly to a flat table without loss of structure.
The reverse direction — CSV to JSON — handles the other way. Round-trips are lossless for flat array-of-objects data.
Is it private?
Yes. The converter is JavaScript running on your own machine — no server, no upload, no cloud storage. The file is read into browser memory, transformed, and offered as a download. Nothing leaves your device.
Frequently asked questions
- What JSON shape does this converter accept?
- It works on a top-level array of flat objects, where every element has the same keys and values are strings, numbers, or booleans. Each object becomes one CSV row, and the key names from the first object become the column headers.
- What happens if my JSON has nested objects or arrays?
- Nested objects, arrays-as-values, or JSON that is not a top-level array do not map cleanly to a flat table without losing structure. When the input does not fit, the converter tells you clearly instead of guessing.
- Are my files uploaded to a server?
- No. The converter is JavaScript running on your own machine. The file is read into browser memory, transformed, and offered as a download, so nothing leaves your device.
- Is it free, and do I need an account?
- It is free with no watermarks, no daily caps, and no sign-up. Drop a file, convert it, and download the result.