OpenAPI to JSON

Convert OpenAPI YAML to JSON

OpenAPI YAML
JSON Output

About OpenAPI Converter

Convert your OpenAPI (Swagger) YAML specifications to JSON format. This tool uses js-yaml to parse the YAML and outputs formatted JSON.

About OpenAPI to JSON Schema

1What is it?

Convert OpenAPI (Swagger) definitions to standard JSON Schema. Extract schemas from your API documentation for use in validation, testing, or other tools. Supports both YAML and JSON input formats.

2Use Cases

  • Extract data models from API documentation
  • Generate validation schemas for frontend forms
  • Create mock data generators based on API specs
  • Validate API responses against defined schemas
  • Migrate legacy Swagger specs to JSON Schema

3Examples

Extract Schema

Input

components:
  schemas:
    User:
      type: object...

Output

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "definitions": { ... }

?Frequently Asked Questions

What versions of OpenAPI are supported?

We support OpenAPI 3.0 and 3.1, as well as Swagger 2.0 definitions.