What interface name is used?
The generated interface is named RootObject in this version.
JSON tool
JSON to TypeScript
Generate a TypeScript interface from sample JSON data.
Common use cases
- Format API responses for debugging.
- Clean JSON before sharing it in docs.
- Prepare examples for prompts, tests and frontend code.
Example input
{"id":123,"name":"AI JSON Format","tags":["json","tools"],"active":true}Related tools
AI JSON Repair
Fix broken JSON from ChatGPT, APIs, logs and config files with local repair and optional AI fallback.
JSONFreeJSON Formatter
Prettify JSON with readable indentation, validation and one-click copy.
JSONFreeJSON Validator
Validate JSON syntax and find parse errors before using it in code or APIs.
JSONFreeJSON Minifier
Remove whitespace from JSON for compact API payloads and config snippets.
JSONFreeJSON to CSV
Convert JSON arrays and objects into CSV tables for spreadsheets and reports.
JSONFreeCSV to JSON
Convert CSV tables into JSON arrays with header-based object keys.
JSONFreeFAQ
How are arrays handled?
Arrays infer from the first item and fall back to unknown[] when empty.
Should I review the types?
Yes. Generated types are a fast starting point, not a substitute for API documentation.