Swagger to OpenAPI Converter
Convert Swagger 2.0 specifications to OpenAPI 3.0. Upgrade your legacy API documentation to the latest standard with automatic schema migration.
Swagger 2.0 Specification
Why Upgrade to OpenAPI 3.0?
OpenAPI 3.0 offers better support for modern APIs including callbacks, links, improved request body handling, and cleaner component organization. Many tools now prefer or require OpenAPI 3.x format.
FAQ
What changes in the conversion?
Key changes include: 'swagger' becomes 'openapi', 'definitions' moves to 'components/schemas', body parameters become requestBody with content types, security definitions become securitySchemes, and $ref paths are updated.
Will my API still work the same?
The converted spec describes the same API - only the documentation format changes. You may need to update tools that consume the spec (like code generators) to support OpenAPI 3.0.
Does it support YAML input?
Currently only JSON input is supported. Convert your YAML to JSON first using a YAML-to-JSON converter, then use this tool.