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Postman to OpenAPI — Export OpenAPI YAML

Convert Postman Collections into OpenAPI 3 YAML locally in your browser, extracting paths, methods, and basic parameters. Useful for moving collections into Swagger workflows.

Quick switch→cURL to Code
PostmanOpenAPISwagger
Quick switch:cURL to CodeGraphQL FormatterYAML to JSON

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Use cases

  • Migrate older Postman collections to OpenAPI
  • Export specs for gateways or code generators
  • Standardize team API descriptions

How to use

  1. Paste Postman Collection v2 JSON
  2. Wait for OpenAPI YAML conversion
  3. Copy or export the YAML file

Example input and output

Collection summary

{"info":{"name":"API"},"item":[{"name":"List","request":{"method":"GET","url":"{{base}}/items"}}]}

OpenAPI path

paths:
  /items:
    get: ...

FAQ

Which Collection version is supported?

Common Collection v2 and v2.1 exports are supported. Very old structures or private extensions may need re-export from Postman.

Are environment variables preserved fully?

Paths and request metadata are mapped where possible. Complex scripts, tests, and some dynamic variables are not migrated one-to-one.

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