JSON Formatter/Validator
Format, validate, and minify JSON data
JSON Input
Output
JSON Tips
- • Use double quotes for strings, not single quotes
- • Property names must be in double quotes
- • No trailing commas allowed
- • No comments allowed in JSON
- • Numbers, booleans, null, strings, arrays, and objects are valid values
About JSON Formatting and Validation
JSON (JavaScript Object Notation) is a lightweight data interchange format that is easy for humans to read and write, and easy for machines to parse and generate. It has become the standard format for API communication, configuration files, and data storage across virtually all programming languages and platforms.
Why Format and Validate JSON?
- Debugging: Prettified JSON makes it easy to spot structural errors, missing commas, or mismatched brackets in API responses.
- Code Reviews: Well-formatted JSON in configuration files improves readability and makes changes easier to review in version control diffs.
- Minification: Remove unnecessary whitespace to reduce file size for production environments, improving load times and bandwidth usage.
- Validation: Verify that JSON data conforms to proper syntax before sending it to an API or storing it in a database.
Common JSON Errors
The most frequent JSON syntax errors include trailing commas after the last item in an array or object, using single quotes instead of double quotes for strings, and including comments (JSON does not support comments). This tool highlights syntax errors and provides clear error messages to help you quickly identify and fix issues.