Validate and format your JSON with real-time error checking
JSON (JavaScript Object Notation) was first specified by Douglas Crockford in the early 2000s. The format was based on a subset of JavaScript's object literal notation, but its usefulness as a language-independent data format led to its widespread adoption. The first JSON message was transmitted in April 2001. Since then, JSON has become the de facto standard for web APIs, replacing XML in many applications due to its simplicity and ease of use.
JSON is a lightweight, text-based data interchange format that is completely language independent. Despite its derivation from JavaScript, JSON is now used with virtually every programming language. It represents data through a simple notation of key-value pairs and ordered lists, making it both human-readable and machine-parseable.
JSON syntax is derived from JavaScript object notation, but with some specific rules and restrictions.
| Language | Parse Method | Stringify Method |
|---|---|---|
| JavaScript | JSON.parse() | JSON.stringify() |
| Python | json.loads() | json.dumps() |
| Java | ObjectMapper.readValue() | ObjectMapper.writeValueAsString() |
| C# | JsonSerializer.Deserialize() | JsonSerializer.Serialize() |
| Go | json.Unmarshal() | json.Marshal() |
| PHP | json_decode() | json_encode() |
| Ruby | JSON.parse() | JSON.generate() |
| Rust | serde_json::from_str() | serde_json::to_string() |
| Swift | JSONDecoder().decode() | JSONEncoder().encode() |
| Kotlin | Json.decodeFromString() | Json.encodeToString() |