JSON to Types
Generate TypeScript/Java/Go/Python type definitions from JSON
About This Tool
JSON to Types helps you generate typescript/java/go/python type definitions from json. Common searches include JSON to type, JSON to TypeScript, JSON to Java, making it useful for quick browser-based processing and immediate results.
Common Use Cases
- JSON to Types：Debug common issues in APIs, logs, and scripts
- JSON to Types：Create parameters for development and testing
- JSON to Types：Verify configuration before deployment or scheduled jobs
Practical Tips
- Test with a small example before applying the result in production
- Use this as a helper, not as a replacement for production validation
Features
- ✓Generate TypeScript/Java/Go/Python types from JSON in one click
- ✓Infers nested objects, arrays, and merged array shapes
- ✓Nullable handling (TS optional / Go pointer / Python Optional)
- ✓Custom root type name and indentation
- ✓Switch between four languages with one-click copy
- ✓Runs entirely in your browser, nothing uploaded
How to Use
- 1Paste or type JSON into the input box
- 2Pick a target language (TypeScript / Java / Go / Python)
- 3Set the root type name and indentation (optional)
- 4Review the output and click copy to export the code
FAQ
Which languages are supported?
TypeScript (interface), Java (class), Go (struct with json tags), and Python (dataclass with type hints).
What if array elements have inconsistent shapes?
The tool merges the fields of array members; keys present in only some elements are marked optional.
Is my data uploaded to a server?
No. All JSON parsing and type inference happen locally in your browser. Your data never leaves your device.