JSON to TypeScript Converter
Generate TypeScript interfaces from JSON API responses locally and securely.
How ZeroData protects your privacy
- ✓ No Uploads: Processing happens entirely via client-side JavaScript.
- ✓ No Storage: We do not have a database. We physically cannot save your data.
- ✓ No Tracking: We don't log what you process or track your inputs.
- ✓ Verifiable: Check your DevTools Network tab. You will see 0 outbound requests.
How to Use the JSON to TypeScript Converter
- Paste your JSON object or array into the input editor on the left.
- Click Generate Interfaces to analyze the structure and produce TypeScript types.
- Review the generated interfaces in the output editor.
- Copy the TypeScript interfaces or download them as a .ts file for your codebase.
Frequently Asked Questions
Does this handle nested JSON objects and arrays?
Yes. The generator recursively traverses the entire JSON structure, creating separate named interfaces for each nested object. Arrays are typed based on their element structure.
Is my JSON data uploaded to a server?
No. All parsing and interface generation happens entirely in your browser using client-side JavaScript. Your API responses and data structures never leave your device.
Can I use the generated interfaces directly in my TypeScript project?
Yes. The output is valid TypeScript that you can copy directly into a .ts file. The interfaces use standard TypeScript syntax compatible with any TypeScript version.
How does it handle arrays with mixed types?
The generator analyzes array elements and creates union types when elements have different structures. For homogeneous arrays, it creates a single typed array.
Does it support JSON arrays as the root element?
Yes. If you paste a JSON array, the tool will analyze the first element's structure to generate the interface and type the root as an array of that interface.
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