Does the JSON to Go converter upload my JSON?

No. JSON parsing, inference, and Go generation run in a dedicated worker in your browser.

How are optional JSON fields represented in Go?

Fields missing from some object samples can use pointers and omitempty. Arrays are inferred from every sampled element.

/tools/json-to-go

JSON to Go Struct Generator

Convert JSON into typed Go structs with nested declarations, JSON tags, and evidence-based optional fields.

json-to-go://local

Root type Package Pointers for optional or nullable values Add omitempty where applicable

JSON sample

Choose JSON

Go structs

Ready. Paste valid JSON or choose a file to infer Go structs locally.

/usage

How to convert JSON to Go structs

Paste a representative JSON object or array, drop a file, or load the sample.
Name the root type and Go package, then choose pointer and omitempty behaviour.
Generate, review the inferred field semantics, and copy or download the .go source.

/inference

Struct inference across complete JSON samples

Nested objects and arrays

Every object in an array contributes to one merged shape. A field becomes optional only when it is absent from at least one observed object, rather than because the first item happened to omit it.

Idiomatic Go names and tags

Fields are exported, common initialisms such as ID, URL, and API are preserved, name collisions are resolved, and original JSON keys remain in struct tags.

Numbers, null, and mixed values

Whole numbers become int64 and decimals become float64. Nullable concrete values can use pointers; null-only or genuinely mixed values use any with a visible warning.

Bounded local processing

A dedicated worker builds a compact type graph without cloning the parsed payload. Input, traversal, schema, depth, and output limits prevent unbounded work and the worker is released after use.

/faq

JSON to Go questions

Is my JSON sent to a server?

No. Parsing, schema inference, and Go emission run inside your browser. Data Demon does not receive the input or generated code.

Will the generated Go compile without review?

The output is syntactically structured Go, but inference cannot know your domain rules. Review nullability, numeric ranges, time formats, validation, and whether any should become a domain type.

Why does an empty array become []any?

An empty array contains no evidence about its element type. Add a representative item to the JSON sample or replace any after generation.