[
{"name": "Alice Chen", "revenue": 84200},
{"name": "Bob Martinez", "revenue": 63100}
]
name,revenue Alice Chen,84200 Bob Martinez,63100
JSON to CSV. CSV to JSON. 100% client-side. Your data never touches a server — not even ours.
Drop in JSON or CSV. The tool auto-detects the format and detects nested structures for intelligent flattening.
Bidirectional conversion happens in your browser — no network request, no server, no waiting.
One click copies the result. One click downloads as a file. Done.
Zero bytes sent to any server. Your data is processed entirely in your browser via JavaScript. We can't see it — nobody can.
Sub-10ms conversion for typical payloads. Large files handled via streaming — no browser freeze, no spinner.
Open the tool, do your conversion, close the tab. No email, no signup flow, no cookie banners. Just the tool.
The converter is and always will be free. No usage limits, no watermarks, no artificial friction.
We needed a JSON to CSV converter. Every result on Google was either an ugly page with a dozen display ads, a tool that sent our data to a server we didn't trust, or a desktop app that took 30 seconds to open. So we built Nominal.
The web has thousands of converter tools. Almost none of them are fast, clean, or honest about what they do with your data. We decided to make one that is. That's the whole product.
Paste. Convert. Done. That's the whole workflow.