JSON Formatter and Validator — Browser Developer Tool

Developer

JSON Formatter and Validator is a browser-based developer tool that parses, formats, or minifies json.

JSON Formatter and Validator

Runs in this browserInput is processed only in this browser. It is not sent to or stored on a server.

Validation uses JSON.parse. Invalid JSON reports a position when the browser provides one.

JSON input

Formatted JSON

Next actions

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What is it

JSON Formatter and Validator lets you paste code or strings and inspect the result immediately. It is useful for debugging, validation, and encoding tasks without server storage.

output = JSON.stringify(JSON.parse(input), spacing)

How to use

1Paste the input.
2Choose a mode if available.
3Read and copy the result.

Reference

JSON Formatter and Validator — Browser Developer Tool Reference
Input	Result
sample	parses, formats, or minifies JSON

Sources & standards

MDN Web Docs: Client-side web APIs - MDN Web Docs
ECMAScript Language Specification - Ecma International

FAQ

Is JSON Formatter and Validator input sent to a server?

No. This tool runs in your browser and does not send input to a server.

Can I use JSON Formatter and Validator with sensitive values?

It runs in the browser, but avoid pasting tokens or passwords on shared devices or during screen sharing.