Paste your raw, minified or broken JSON — get it formatted, color-coded and validated instantly. Everything runs in your browser, nothing is sent to a server.
A JSON Formatter takes minified or unreadable JSON data and reformats it with proper indentation, line breaks, and syntax highlighting. It turns this:
{"name":"John","age":30,"skills":["php","react"]}
Into a clean, readable structure where you can instantly spot missing commas, mismatched brackets, or incorrect data types.
1. Paste your JSON into the input area on the left.
2. Click "Format & Validate" to beautify and check for errors.
3. Click "Minify" to compress JSON for production use.
4. Click "Copy" to copy the formatted output to your clipboard.
JSON (JavaScript Object Notation) is a lightweight data-interchange format. It's the standard for APIs, configuration files, and data storage across virtually every programming language — PHP, Python, JavaScript, Go, Rust, and more.
Common JSON errors include: trailing commas, single quotes instead of double quotes, unquoted keys, missing colons or brackets, and comments (JSON doesn't support comments). This tool catches all of these.
Absolutely. This tool runs entirely in your browser using JavaScript. No data is transmitted to any server. You can verify this by disconnecting from the internet — the tool still works.