JSON to TypeScript Converter
Generate TypeScript interfaces from JSON
JSON to TypeScript Converter is a free online tool from BrowserUtils that generate typescript interfaces from json. It runs entirely in your browser — your data never leaves your device. No account required.
How to use JSON to TypeScript Converter
- 1 Paste or type your input into the editor above.
- 2 The tool processes your data instantly — right in your browser, with nothing sent to a server.
- 3 Copy the result with one click or continue editing your input.
About JSON to TypeScript Converter
Free online JSON to TypeScript converter. Automatically generate TypeScript interfaces and types from JSON data. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
JSON to TypeScript Converter specs
- Runtime
- 100% client-side (browser)
- Cost
- Free — no account, no rate limits, no usage caps
- Browser support
- Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
- Part of
- 299 developer tools on BrowserUtils (100% client-side)
Questions
How do I generate TypeScript types from a JSON API response?
Paste the JSON response into the input field and the tool will analyze the structure and data types to generate matching TypeScript interfaces. Nested objects become separate named interfaces with proper references.
Does the converter handle arrays and optional fields?
Yes, the tool infers array element types and generates typed arrays (e.g., string[] or MyInterface[]). Fields that appear as null in the JSON are marked as optional with the ? modifier in the generated interface.
Is the JSON to TypeScript converter safe for sensitive API data?
Yes, all parsing and type generation happen in your browser. No JSON data is sent to a server, so you can safely paste production API responses.
Can I use the generated TypeScript interfaces directly in my project?
Yes, the output is valid TypeScript that you can copy into a .ts file. You may want to rename the root interface to match your domain model.
How does JSON to TypeScript handle nested objects?
Each nested object is extracted into its own named interface. The parent interface references the child by name, keeping the output clean and reusable across your codebase.
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