JSON to Java DTO Converter — Free
Free online JSON to DTO generator for Spring Boot REST APIs, OpenAPI contract work, and integration testing. Paste a webhook body or Postman response and get starter Java records, Python dataclasses, Go structs, or Rust models with field names inferred from JSON keys — then refine with validation annotations and separate request/response types.
- Bootstrap @RequestBody DTOs from real API samples instead of typing fields manually
- Generate nested object models when JSON contains profile, address, or line-item arrays
- Switch output language for polyglot microservices or BFF layers
- Pair with the JSON formatter tool to validate payloads before code generation