API Tools
A set of browser-based tools for testing webhooks and GraphQL queries, formatting API responses, converting curl commands to code, calculating rate limits, validating OpenAPI and Swagger specs, and converting between Postman collections and OpenAPI. Requests you send with these tools go directly from your browser to the endpoint you specify; everything else runs locally and is never sent to a server.
Webhook Tester
Fire a test HTTP request at a webhook URL and inspect the raw response.
Open toolAPI Response Formatter
Pretty-print a raw API response's JSON body, headers and all.
Open toolcURL to Code Converter
Convert a curl command into equivalent JavaScript, Python, Node.js, PHP, or Go code.
Open toolAPI Rate Limit Calculator
Convert an API's rate limit into requests-per-second and estimate how long a batch will take.
Open toolOpenAPI Validator
Check an OpenAPI 3.x spec for missing fields, bad paths, and duplicate operationIds.
Open toolSwagger Validator
Check a Swagger 2.0 spec for missing fields, bad paths, and duplicate operationIds.
Open toolPostman Collection Analyzer
Summarize a Postman Collection's requests, methods, auth types, and scripts.
Open toolPostman to OpenAPI Converter
Convert a Postman Collection into an OpenAPI 3.0.3 document.
Open toolOpenAPI to Postman Converter
Convert an OpenAPI 3.x or Swagger 2.0 spec into a Postman Collection v2.1.
Open toolGraphQL Query Tester
Send a GraphQL query or mutation to any endpoint and see the raw response.
Open toolPostman JSON to cURL
Convert a single Postman request-item JSON into an equivalent curl command.
Open toolOpenAPI Example Payload Generator
Generate a sample JSON payload from an OpenAPI/Swagger schema fragment.
Open toolGraphQL to REST Mapping Helper
Suggest heuristic REST verb+path mappings for a GraphQL query or mutation's top-level fields.
Open toolREST API Config Generator
Generate a structured JSON route config and Markdown docs stub from a list of routes.
Open toolOpenAPI Generator
Generate a full OpenAPI 3.1 YAML document from a list of paths and an auth scheme.
Open toolSwagger YAML Generator
Generate a Swagger 2.0 YAML document with example responses, for Swagger UI.
Open toolPostman Collection Generator
Build a valid Postman Collection v2.1 JSON file from a list of requests.
Open toolGraphQL Schema Generator
Generate GraphQL SDL types, queries, and mutation stubs from a described data model.
Open toolGraphQL Schema Validator
Check GraphQL SDL for unbalanced braces, bad field syntax, duplicate types, and unknown type references.
Open toolcURL to Postman JSON Converter
Convert a curl command into a Postman request-item JSON object.
Open tool