How to Use the JSON Formatter
- Paste your unformatted or raw JSON string into the input box on the left.
- Select your preferred indentation level (2 spaces, 4 spaces, or tabs).
- Click Format JSON to instantly structure and beautify your data.
- Review error alerts if your JSON syntax contains mistakes.
- Click Copy Output or Download .json to save your result.
What is JSON?
JSON (JavaScript Object Notation) is a lightweight, text-based data interchange format widely used in web development, REST APIs, GraphQL services, and configuration files. Because JSON is language-independent, it serves as the universal standard for passing data between servers and web browsers.
Common JSON Syntax Mistakes
- Trailing Commas: Adding a comma after the final key-value pair in an object or array.
- Single Quotes: Using single quotes (
'key') instead of double quotes ("key"). - Unquoted Keys: Omitting double quotes around object key names.
- Unescaped Special Characters: Failing to escape double quotes or newlines inside strings.