Integrate an API
Create nested structs and JSON tags from a representative response body.
100% local · files never leave your browser
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
Waiting
♢
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.
How it works
Go Struct, without the upload.
Add your data
Paste a value, open a local file or begin with the working sample.
Run the tool
The transformation executes in your browser, not on our servers.
Review the result
Check the output, then copy or download it for your next task.
Important limitations
What to check before using the result
Review required
One sample cannot determine when fields should be pointers, optional or represented by custom types.
Review required
Review numeric precision, time values and nullable fields before production use.
Common questions
About Go Struct
Does JSON to Go Struct upload my data?
No. Your input is processed by code running in your browser and is not sent to an application server.
Is Go Struct free to use?
Yes. The tool is free, requires no account and can be used directly in the browser.
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.