What Is a JSON Formatter?
A JSON formatter takes raw JSON text and rewrites it with proper indentation and line breaks so it's easy to read, or compresses it into a compact single line (minified) for smaller file sizes. It also checks whether the JSON is valid and points out exactly where a syntax error occurs.
How Does This Tool Work?
Paste Your JSON
Copy your JSON text into the input box.
Choose an Action
Format, minify, or just validate it.
Copy the Result
Get the formatted output or error details instantly.
Frequently Asked Questions
The tool shows an error message explaining what went wrong, such as a missing comma or an unexpected character, along with its approximate position in the text.
Minifying removes all unnecessary spaces and line breaks, producing the smallest possible valid JSON, useful for reducing file size in production.
No. All formatting and validation happens locally in your browser using JavaScript. Nothing is uploaded to a server.
Yes, completely free with no account or signup required.