JSON (JavaScript Object Notation) is the standard format for exchanging data between web servers, APIs, and applications. Raw JSON returned by an API is often compressed onto a single line with no spacing, making it nearly impossible to read by eye. This tool formats (beautifies) JSON with proper indentation and line breaks, and validates that it's syntactically correct.

• Paste your raw JSON into the input box.
• Click "Format & Validate" to beautify it with indentation, or "Minify" to compress it back down.
• If the JSON is invalid, an error message shows what's wrong.
• Click "Copy Output" to copy the result to your clipboard.

Debugging API Responses

When testing an API, raw responses are often unformatted. Beautifying the JSON makes it far easier to spot the specific field or value you're looking for.

Validating Configuration Files

Many applications use JSON for configuration files. A single missing comma or bracket can break the entire file — this tool catches syntax errors instantly.

Reducing File Size for Production

Minifying JSON removes unnecessary whitespace, reducing file size for production use where every byte of network transfer matters.

Is my JSON data sent to your server?
No, all formatting and validation happens directly in your browser using JavaScript — nothing is transmitted anywhere.

What if my JSON has a syntax error?
The tool shows a clear error message describing what went wrong, helping you locate and fix the issue.