Free Online API Converter (Postman ⇄ OpenAPI ⇄ MCP)
Convert Postman collections, OpenAPI specs, and MCP definitions instantly. Upload, paste JSON or YAML, or fetch from a URL — our converter normalizes, validates, and exports your target format in seconds.
Free Online API Converter — convert Postman collections, OpenAPI specs, and MCP definitions between formats (JSON or YAML). Supports OpenAPI 3, Postman to OpenAPI, OpenAPI to MCP, and more.
API Trench helps developers transform API specifications quickly: Postman ⇄ OpenAPI ⇄ MCP. No installation, instant conversion, schema validation included.
Import your API
Drop a file, paste JSON/YAML, or fetch by URL.
Drag & drop Postman/OpenAPI JSON or YAML
or choose a file / paste / fetch by URL
Detected: —
Import a file, paste JSON/YAML, or fetch by URL.