JSON Formatter

Format, validate, and minify JSON data in your browser. Paste raw JSON and get clean, indented output with syntax error highlighting. Your data stays on your device.

Key features

Instantly make complex codes suitable for human reading
Mark faulty JSON syntaxes in red
Minify feature that reduces file size
Modern editor view that is easy on the eyes

Guide

JSON is the data format that runs the modern web. Every REST API you call returns JSON. Every configuration file in a Node.js project uses JSON. Frontend state, database exports, logging pipelines, serverless function payloads, package manifests, Terraform plans, and CI/CD configs all rely on it. When you are working with JSON daily, a reliable formatter and validator is not a nice-to-have. It is a core part of your workflow. This tool takes raw, minified, or malformed JSON and turns it into cleanly indented, syntax-highlighted output you can actually read. It also validates the structure and pinpoints errors with line numbers. You can minify valid JSON for production use. Everything runs in your browser. No data leaves your device. ## What JSON Formatting Actually Does JSON formatting (also called beautifying or pretty-printing) adds consistent indentation and line breaks to a JSON string. A minified API response like {"users":[{"id":1,"name":"Alice\

Frequently asked questions

Is my data being saved?

No, your data stays only in your browser. No data is shared with us.

How can I find the error?

When you enter a faulty JSON, our system will warn you along with the line number.

Is this a free JSONLint or JSON Crack alternative?

Yes! WebRecast formats, validates, and minifies JSON just like JSONLint - completely free, private, and no account needed.