NNWS Tools

CSV ↔ JSON

Convert tabular data both ways.

Runs on your device
CSV
JSON
Built by nihmathullah.com — need a tool like this for your business?
We design premium websites, web apps and CRMs. Have a project in mind?

Converters tools

Unit ConverterCSV ↔ JSONNumber BaseCurrency ConverterTimezone Converter

About CSV ↔ JSON

CSV ↔ JSON is a free, private converters tool that lets you convert tabular data both ways. Like every tool on NWS Tools, it runs entirely in your browser — nothing is uploaded, there are no accounts, and there's no tracking. Just open it and go.

Frequently asked questions

Is CSV ↔ JSON free to use?
Yes. CSV ↔ JSON is completely free, with no account, sign-up or limits.
Are my files or data uploaded anywhere?
No. CSV ↔ JSON runs entirely in your browser. Your files, text and numbers are processed on your own device and are never uploaded to a server.
Does CSV ↔ JSON work offline?
Once the page has loaded, most tools keep working with no internet connection. NWS Tools is a Progressive Web App you can even install.
Do I need to install any software?
No installation is required — CSV ↔ JSON works instantly in any modern browser on desktop or mobile.