JSON to TypeScript Converter — Generate Interfaces Online
Convert a JSON object to TypeScript interfaces — nested types, optional fields, all client-side.
🔒 All processing happens in your browser. Your JSON is never uploaded or sent to any server.
How to Use
- Paste a valid JSON object into the left pane. Supports JSON5 syntax (trailing commas, single quotes, comments).
- Optionally change the Root Interface Name — this becomes the outermost TypeScript interface name. Nested object interfaces are named after their JSON key automatically.
- Click Convert to generate TypeScript interfaces. The Monaco editor on the right shows the result with full syntax highlighting.
- Click Copy Result to copy the generated interfaces to your clipboard and paste them into your TypeScript project.
Frequently Asked Questions
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