Postman to OpenAPI Converter

Convert Postman collection JSON to OpenAPI 3.0 specification. Export your API documentation easily.

Tool workspace

Idle

Local-only. Nothing is uploaded.

OpenAPI title

Leave blank to use collection name.

Version

Defaults to 1.0.0.

Server URL

Optional. Used when no baseUrl variable exists.

Output

Pretty print

Group by folder (tags)Include headers

Input

Postman Collection JSON

Input

Postman Collection JSON

Output

OpenAPI 3.0 JSON

Results

Validation summary and warnings

Paste a Postman collection and click Convert.

Outputs are best-effort. Review before production use.

Process

How it works

Export Collection

Export your Postman collection as JSON (v2.0 or v2.1)

Paste & Configure

Paste the JSON, set title/version/server, and convert

Download OpenAPI

Get openapi.json or openapi.yaml

Use Cases

Common use cases

Migrating API documentation to OpenAPI format

Creating API specs from existing Postman workflows

Generating documentation for API gateways

Integrating with OpenAPI-compatible tools

Standardizing API documentation across teams

Building API clients from Postman collections

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