JSON to Entity Class
Online JSON to entity class tool parsing JSON schema into TypeScript, Java, Python, C#, Go, and Kotlin model code
Target Language
Generation Options
Result Stats
Root Type
-
Class Count
0
Language
TypeScript
JSON Data
Generated Output
Enter JSON data to generate entity class code
Code will be generated automatically after JSON input
Type Analysis
No types to display
Guide
JSON to Entity Class maps JSON fields into multi-language model code so you can reduce manual entity writing and schema mapping work.
Key Features
- Supports TypeScript, Java, Python, C#, Go, and Kotlin model generation.
- Supports nested objects, arrays, nullable fields, and datetime inference.
- Supports root class naming, optional type toggle, and annotation toggle.
- Supports one-click JSON formatting, copy, and file download for fast integration.
How To Use
- Paste JSON data or load the built-in example.
- Choose target language and adjust generation options.
- Review generated code and type analysis output.
- Copy or download and integrate into your project.
Use Cases
- Generate data models during frontend-backend API integration
- Map third-party API schemas to internal entities quickly
- Create backend entity skeletons during project bootstrap
- Speed up prototype delivery and test schema setup
Common Type Mapping
| JSON Type | TypeScript | Java | Python | C# | Go |
|---|---|---|---|---|---|
| string | string | String | str | string | string |
| number (int) | number | Integer | int | int | int |
| number (float) | number | Double | float | double | float64 |
| boolean | boolean | Boolean | bool | bool | bool |
| array/object | T[] / interface | List<T> / class | List[T] / dataclass | List<T> / class | []T / struct |
FAQ
- Will JSON be uploaded: no, parsing and generation run locally in the browser.
- Does it support nested schemas: yes, nested objects and object arrays become separate models.
- What if parsing fails: check commas, quotes, and bracket pairs first.
- Can output be used directly: yes as a base model, then adjust naming and annotations by team conventions.
Privacy
Your JSON input and generated code stay in your browser and are not uploaded to the server.