JSON Tool
JSON Validator
Validate your JSON syntax instantly. Get detailed error messages with line numbers to fix issues quickly.
JSON Input
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About JSON Validator
JSON Validator is a tool that checks whether your JSON (JavaScript Object Notation) is syntactically correct. It helps identify and locate errors in your JSON data.
Common JSON Errors
- Missing quotes: All property names must be in double quotes
- Trailing commas: JSON does not allow trailing commas after the last element
- Single quotes: JSON requires double quotes, not single quotes
- Unescaped characters: Special characters in strings must be escaped
- Comments: Standard JSON does not support comments
Valid JSON Data Types
- String: Text in double quotes - "hello"
- Number: Integer or decimal - 42, 3.14
- Boolean: true or false
- null: Empty value
- Array: Ordered list - [1, 2, 3]
- Object: Key-value pairs - {"key": "value"}
JSON Syntax Rules
- Data is in name/value pairs
- Data is separated by commas
- Curly braces hold objects
- Square brackets hold arrays
- Names must be strings in double quotes