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JSON Formatter & Validator

Parse, format, and validate JSON. All processing happens in your browser.

Paste or type JSON
Enter your JSON below. Click Parse to validate, Format to pretty-print, or Minify to compress.

What is a JSON Formatter?

A JSON formatter (or JSON beautifier) makes JSON data readable by adding indentation and line breaks. JSON (JavaScript Object Notation) is used everywhere—APIs, config files, data storage. Raw JSON often comes as one long line, which is hard to read. This tool formats it so you can understand and debug it easily.

How to Format JSON Online

  1. Paste your JSON string into the input box. It can be minified (one line) or already formatted.
  2. Click "Parse / Validate" to check if your JSON is valid and see the formatted result.
  3. Use "Format (Pretty)" to beautify with indentation, or "Minify" to compress it for production.

JSON Validator & Syntax Checker

Invalid JSON causes errors in apps and APIs. This tool acts as a JSON validator—it checks your syntax and shows exactly where the error is (line and column). Fix missing commas, extra brackets, or unescaped quotes before they break your code. All processing happens in your browser; your data is never sent to a server.