Free Online Developer Tool
JSON Formatter
Format and validate JSON instantly. This free online JSON formatter helps you prettify, check, and clean JSON data for development, debugging, and API work.
Paste JSON to validate and format it.
Formatted JSON will appear here.
How this JSON formatter works
This tool parses your JSON input and reformats it into a clean, readable structure with proper indentation.
If the JSON is invalid, the tool shows an error message so you can quickly spot formatting problems.
It is useful for API responses, configuration files, debugging, and development workflows.
Frequently Asked Questions
What is a JSON formatter?
A JSON formatter takes raw JSON data and displays it in a cleaner, more readable format with spacing and indentation.
Can this tool validate JSON too?
Yes. It checks whether your input is valid JSON and shows an error if the format is incorrect.
Is this JSON formatter free?
Yes. Tool Nova provides this JSON formatter online for free with no sign-up required.