JSON to Go Struct
Generate Go structs with the right field types and json: tags from any JSON sample. Nested objects become named nested types. Useful for scaffolding API client types when you have an example response but no schema.
How to use the JSON to Go Struct
Paste JSON. Output uses canonical Go field naming (PascalCase) with json: tags matching the original keys. Pointers aren't generated for optional fields — adjust manually if you need nullable semantics.
Generating Go structs from JSON
Go decodes JSON into structs, and the struct tags decide how fields map to keys — but writing those structs by hand from a real response means transcribing every field, picking the right type, and adding a json: tag for each one. For a deeply nested payload that is a lot of fiddly typing before you have written any actual code.
This generates Go structs from a JSON sample with canonical PascalCase exported field names and matching json: tags, turning nested objects into named nested types. It does not emit pointers for optional fields, so adjust those by hand if you need nullable semantics. For other languages the Rust and C# generators apply the same approach.
Common use cases
- Scaffold client types — build structs from an example API response.
- Correct json tags — get
json:tags that match the original keys. - Exported names — produce PascalCase fields that marshal correctly.
- Nested types — turn nested objects into named struct types.
- No schema needed — generate types when all you have is a sample.