JSON → Go structs

Client

Infer struct fields and nested types from one JSON sample; adjust numeric types and pointers before production use.

Learn more: JSON and Go

Emit `struct` types with `json` tags from one sample—similar to the C# and Java generators, oriented toward encoding/json.

Types

Numbers map to float64 by default; tighten to int64 or custom types where your API guarantees them. Nested objects become nested struct types with inferred names.

JSON → Go

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Parses JSON in your browser and emits classes inferred from the sample shape. Nested objects become nested types; arrays use the first element only to guess item shape. Nothing is uploaded.

Rename types, use pointers or nullable types where needed, and align tags with your JSON encoder/decoder.

Common use cases

  • Scaffold structs with json tags for encoding/json from a captured API response.
  • Compare inferred field types against your server’s actual structs during migrations.
  • Drop starter types into a Go module before refining pointers and omitempty tags.

Common mistakes to avoid

  • Using float64 for every number

    Samples may not show integers vs floats correctly. Switch to int64 or custom types when semantics matter.

  • Forgetting omitempty for optional API fields

    Generator hints at shape; optional presence still follows your API contract—adjust tags before encoding.

FAQ

Is struct generation local?

Yes. JSON is parsed and code is emitted entirely in your browser.

Does output include validation?

No. It suggests types and tags. Add validation and error handling in your Go code.

More tools

Related utilities you can open in another tab—mostly client-side.