Free Online JSON Formatter & Validator
Paste your JSON below to format, validate, or minify it. The validator pinpoints syntax errors with line and column numbers, making it easy to debug invalid JSON.
How to Use the JSON Formatter
1. Paste Your JSON
Copy and paste your JSON data into the input box. It can be minified or already formatted.
2. Choose an Action
Click Format to beautify, Minify to compress, or Validate to check for syntax errors.
3. Copy the Result
The processed output appears in the output box. Click Copy Result to copy it to your clipboard.
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data format used to exchange data between servers and web applications. It is human-readable, easy to parse, and supported by virtually every programming language.
A valid JSON document must follow strict syntax rules: keys must be wrapped in double quotes, strings use double quotes, and trailing commas are not allowed. Our validator catches these common mistakes and shows you exactly where they occur.