✅ Online JSON Validator & Formatter

Input & Validate JSON

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What is JSON and Why Validate It?

An Online JSON Validator checks the correctness and syntax of JSON (JavaScript Object Notation) data against the official specification. It ensures the JSON is well-formed before it's used in applications or APIs, preventing common parsing errors.

Checks Performed by the Validator:

• Syntax Validation: Correct placement of {}, [], colons :, and commas ,.
• JSON Structure: Ensures data follows the key-value pair format.
• Data Types: Verifies only valid JSON types are used (strings, numbers, objects, arrays, booleans, null).
• No Trailing Commas: Trailing commas (e.g., {"a": 1,}) are flagged as errors.
• No Comments: JSON does not support JavaScript-style comments (// or /*...*/).

About JSON Format

JSON (JavaScript Object Notation) is a lightweight, human-readable data interchange format. It is language-independent but uses conventions familiar to C-family languages. JSON is primarily used for transmitting data between a server and web applications.

JSON Format Rules:

1. Objects are enclosed within curly braces {}.
2. Arrays (ordered lists of values) are enclosed within square brackets [].
3. Key-value pairs are separated by a colon :.
4. Keys (names) must be strings and must be enclosed within double quotes (e.g., "name").
5. Values can be strings, numbers, objects, arrays, booleans (true or false), or null.