JSON to Rust Struct Generator
Generate nested Rust model definitions from a JSON example. Review the inferred fields, then copy or download the source.
Open toolJSON to Go Struct Generator
Generate Go structs from a JSON object or representative object array. Review exported field names, JSON tags and inferred types, then copy or download models.go.
Free to useNo sign-upRuns in your browser
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Enter the inputs, then select Generate Go.
Your result
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Result will appear here
How JSON to Go Struct Generator works
The JSON to Go struct converter infers nested objects and fields with quicktype, then emits Go struct definitions and JSON tags.
Exported Go field names can differ from JSON keys, with json tags recording the mapping. Missing sample fields can produce pointer types and omitempty tags. The output is a source starting point; it does not test encoding/json behavior in your application.
How to use JSON to Go Struct Generator
Paste a representative JSON object or object array and choose a root type name before generating the Go definitions.
Paste representative JSON and name the root type
Include nested objects, arrays, missing fields and null values that occur in real sample records. Use an object or nonempty object array and enter the root type name in its separate field.
Input and settings
Generate Go structs and JSON tags
Run Generate Go and inspect the root shape and nested struct types. Compare exported field names with their json tags, particularly when the source uses hyphens or other naming conventions.
Tool result
Download models.go and check field types
Copy the definitions or download models.go. Check pointer fields, numeric ranges and JSON tags, and place the definitions in the appropriate package before testing them with your application.
Review the details
Tasks for JSON to Go Struct Generator
Start Go definitions from representative data, then check the source in your project.
Draft Go models for an API response
Use a representative response to start Go model definitions. Compare every field and permitted type with the actual API contract before treating the sample model as complete.
Compare optional fields across JSON records
Supply an array containing representative variations so omitted or null fields can affect inference. Include real array elements when the element type matters; an empty array cannot establish that type.
Review Go field names and json tags
Inspect how each original key maps to an exported Go field. A json tag can keep the original key name even when the field uses a different Go identifier. Test omission and null behavior with encoding/json in your project.
Read Go struct fields, pointers and JSON tags
Compare the Go types with the sample records and the JSON names recorded in tags.
The generated sample can use pointer types for missing fields and json tags with omitempty. Those choices affect your later encoding and decoding, so check them against the contract. An object-array input can create a root slice type alongside its element struct.
Check Go package placement and inferred types
Keep generation separate from compiling and testing the definitions in your Go package.
Use a JSON object or nonempty object array within 100,000 characters. Choose a supported root name of at most 40 ASCII identifier characters beginning with a letter; reserved names are rejected.
Review generated types, numeric ranges and tags before integrating the definitions. Add the package context your source file needs and test JSON encoding and decoding with the expected records; this page does not compile or run Go.
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Open toolGenerate Go structs and JSON tags
Paste representative JSON, choose the root type name and review the Go source before copying or downloading it.
JSON to Go Struct Generator: common questions
Answers about using JSON to Go Struct Generator and understanding its results.
Does the sample define my complete API?
No. Fields and types are inferred from the sample. Review missing fields, null values and numeric ranges against your actual API contract.
Can I download the source?
Yes. Copy the generated definitions or download the source file, then review it in your project.