Integrate an API
Create nested structs and JSON tags from a representative response body.
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Generate tool
JSON to Go Struct
Generate idiomatic Go structs with JSON tags from sample JSON directly in your browser.
✓ Free to use✓ No signup✓ Runs locally
160 bytes · local only
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Processed entirely in this tab
Your input and result are not sent to JSON Hearth or stored on a server.
When to use it
What Go Struct helps you do
Generate Go structs as a starting point for decoding API responses, events and configuration with the standard encoding/json package.
Model event payloads
Turn sample messages into types for consumers, handlers and tests.
Prototype data models
Get a compilable-looking starting structure before refining names, pointers and custom types.
Important limitations
What to check before using the result
- One sample cannot determine when fields should be pointers, optional or represented by custom types.
- Review numeric precision, time values and nullable fields before production use.
Common questions
About Go Struct
Why might I change generated Go field types?
Examples do not reveal every possible value, nullability rule or domain-specific type such as time.Time.
Are JSON tags included?
Yes. Generated fields include tags that preserve the original JSON property names.