JSON Formatter & Validator
Pretty-print, minify and validate JSON
About JSON
JSON (JavaScript Object Notation) is a lightweight, language-independent data interchange format. This tool parses your input with the browser’s native JSON engine, so validation matches exactly what your application will see.
What this tool checks
- Syntax validity — reports the exact position of any parse error
- Structure — nesting depth, key and value counts
- Formatting — configurable indentation for readability
- Minification — strips all optional whitespace
Common mistakes
- Trailing commas after the last element (not valid JSON)
- Single quotes instead of double quotes around keys and strings
- Unquoted object keys
- Comments — JSON has no comment syntax