Postman to OpenAPI Converter
Convert Postman to OpenAPI 3.0 online—paste a Postman collection JSON and export a clean OpenAPI spec.
Tool workspace
IdleLocal-only. Nothing is uploaded.
Leave blank to use collection name.
Defaults to 1.0.0.
Optional. Used when no baseUrl variable exists.
Input
Postman Collection JSON
Results
Validation summary and warnings
Outputs are best-effort. Review before production use.
Process
How it works
Export Collection
Export your Postman collection JSON (v2.0 or v2.1).
Paste & Configure
Paste the collection JSON, set title/version/server, and review.
Convert to OpenAPI 3.0
Convert Postman collection to OpenAPI 3.0 and export the spec.
Download or Copy
Download openapi.json/openapi.yaml or copy the output.
Use Cases
Common use cases
Convert Postman collection JSON to OpenAPI 3.0 specs
Migrate Postman workflows to Swagger/OpenAPI documentation
Generate OpenAPI specs for API gateways and tooling
Standardize API docs across backend and frontend teams
Create SDKs and clients from OpenAPI output
Share API contracts with partners and internal teams
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