Question 1

What is serde in Rust?

Accepted Answer

Serde is the most popular Rust framework for serializing and deserializing data. By adding #[derive(Serialize, Deserialize)] to a struct you can convert it to and from JSON, YAML and many other formats automatically.

Question 2

How are optional fields handled?

Accepted Answer

When a key appears in some objects but not others, the tool wraps the field in Option<T> so it can be None. Enable the rename_all attribute to convert JSON snake_case to Rust snake_case, or use camelCase for consistency.

Question 3

Does this tool support nested objects and arrays?

Accepted Answer

Yes. Nested JSON objects become new Rust structs, and JSON arrays become Vec. Mixed-type arrays fall back to serde_json::Value. Empty objects become serde_json::Map or HashMap.

Question 4

Is my JSON sent to a server?

Accepted Answer

No. The conversion runs entirely in your browser. Your JSON payload never leaves your device, which is especially useful when working with private API contracts or production data.