About JSON Formatter

What is JSON Formatter?

JSON Formatter is a free online tool designed to help developers and technical users format and validate JSON data. Our tool makes it easy to transform unformatted JSON strings into clean, readable formats with proper indentation and structure.

Features

  • Multiple formatting options (2, 3, 4 spaces, tab, or compact)
  • Support for various JSON specifications (RFC 8259, RFC 7159, RFC 4627, ECMA-404)
  • JSON validation with detailed error messages
  • Fix malformed JSON using JSON5 parser
  • Copy formatted JSON to clipboard with one click
  • Support for large JSON files
  • Clean and user-friendly interface
  • Multi-language support