oascvt

A small utility to convert OpenAPI 3.1 specs into OpenAPI 3.0.3-compatible specs for tools like Postman that do not support 3.1 yet.

What it does

• Rewrites openapi: "3.1.x" → openapi: "3.0.3"
• Converts type: "null" and ["T","null"] → nullable: true
• Converts oneOf/anyOf with null into nullable: true
• Removes null values from enum and adds nullable: true
• Simplifies anyOf of string enums into one enum
• Collapses single-element anyOf/oneOf

Usage

node oascvt.js input.json output.json