JSON to RAML Converter

A RAML DataType defines the structure and data types of JSON payloads used in your MuleSoft APIs. They live inside #%RAML 1.0 DataType files and are referenced from your RAML API specification to enforce schema validation on requests and responses.

Yes. Nested objects become nested properties blocks. Arrays output as type: array and the item type is inferred from the first element, covering string, number, boolean, and nested object items.

Checking Optional Keys appends a ? to every property name in the output (e.g., name?: string). In RAML 1.0, this marks the field as not required, which is useful when your API accepts partial payloads in PATCH requests.

Enabling CamelCase converts snake_case or kebab-case JSON keys into camelCase automatically. For example, first_name becomes firstName. This is the convention used in most MuleSoft and Anypoint API designs.

Absolutely not. All conversion logic runs entirely in your browser using JavaScript. No data is transmitted, stored, or logged anywhere. Your payloads — including any sensitive values — never leave your machine.

This tool targets RAML 1.0 DataType syntax, which is the current standard used in Anypoint Platform. RAML 0.8 used a different schema system. If you're still on Mule 3.x with RAML 0.8, minor manual adjustments to the output may be needed.