NNWS Tools

JSON Formatter

Format, validate, minify and tree-view JSON.

Runs on your device
Input
Output
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Developers tools

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About JSON Formatter

JSON Formatter is a free, private developers tool that lets you format, validate, minify and tree-view json. 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 JSON Formatter free to use?
Yes. JSON Formatter is completely free, with no account, sign-up or limits.
Are my files or data uploaded anywhere?
No. JSON Formatter runs entirely in your browser. Your files, text and numbers are processed on your own device and are never uploaded to a server.
Does JSON Formatter 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 — JSON Formatter works instantly in any modern browser on desktop or mobile.