JSON Formatter for JavaScript — JSON.stringify Tool

JSON Formatter for JavaScript Developers

Format JSON online — the instant browser alternative to JSON.stringify(obj, null, 2). Paste minified JSON, get pretty-printed, highlighted output.

The online equivalent of JSON.stringify(obj, null, 2) for when you need to read raw JSON without writing code. Paste any minified JSON and get beautifully formatted, syntax-highlighted output instantly.

Online Equivalent of JSON.stringify(obj, null, 2)

JavaScript's JSON.stringify(obj, null, 2) is the standard way to produce indented JSON. Use our formatter as a zero-code alternative for reading and debugging JSON payloads in the browser.

Quick Paste Sources for JavaScript Developers

DevTools Network tab: Right-click any request → Copy Response → paste here.
Console: Copy output from console.log(JSON.stringify(obj))
API clients: Paste raw body from Insomnia, Hoppscotch, or Postman.

Who this guide is for

Format fetch() API response JSON from DevTools
Pretty print JSON from WebSocket messages
Inspect JSON stored in localStorage or sessionStorage
Debug Express.js and Next.js API route responses

Frequently Asked Questions

Is this tool the same as JSON.stringify(obj, null, 2)?

Yes. The output matches JSON.stringify() with 2-space indentation. You can switch to 4 spaces or tabs.

Can I format JSON from a fetch() response?

Yes. In DevTools Network tab, select the request, go to Response tab, copy the text, and paste it here.

Can it handle JSON with circular references?

No. JSON itself cannot represent circular references. Use JSON.stringify with a replacer or the flatted library to handle those first.