#285 · Developer Tool

OpenAPI Response Example Generator

Create response fixtures from every documented operation and status code in an OpenAPI 3 JSON file. The generator keeps status, description, content type, and the derived body together, which helps reviewers spot responses that have prose but no payload schema. Explicit media examples win; otherwise the body is built from the declared schema. Responses with no content are retained with a null body instead of disappearing from the report.

Developer Input

OpenAPI JSON
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How to use this developer tool

  1. Paste a JSON-formatted API document or load the included sample.
  2. Check that the document shape matches the label above the editor.
  3. Select “Generate Response Examples” or press Ctrl/Cmd + Enter.
  4. Review the summary and download the copy-ready result.

What this developer tool does

The generator expands operation response maps into individual, context-rich example records.

Direct and named examples override schema generation. Content-free responses are represented as null bodies with no content type.

A generated body is illustrative and does not prove that an implementation returns it.

Example

The Sample button loads a small specification chosen for this operation. Running it produces the same structured fields shown in the output panel.

{
  "openapi": "3.0.3",
  "info": {
    "title": "Health",
    "version": "1"
  },
  "paths": {
    "/health": {
      "get": {
        "operationId": "health",
        "responses": {
          "200": {
            "description": "Healthy",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "status": {
                      "type": "string",
                      "example": "ok"
                    },
                    "uptime": {
                      "type": "integer",
                      "minimum": 0
                    }
                  }
                }
…

Use cases

  • Review an API contract during a pull request.
  • Prepare documentation or deterministic test fixtures.
  • Find migration work before changing generators or clients.
  • Export a focused report without sharing the source document.

Tips for reliable output

  • Bundle remote references before running the page.
  • Keep operation IDs stable across published versions.
  • Prefer explicit examples for domain-specific values.
  • Validate the complete document after applying generated output.
  • Commit the original specification before a conversion.

Processing details

Both numeric status keys and default responses are preserved as strings. Local response and schema references are followed.

Headers, links, callbacks, external references, and exact validation of schema composition keywords are not generated.

Frequently asked questions

Does this page accept YAML OpenAPI files?

No. This browser-only implementation accepts JSON so parsing behavior stays predictable without loading an external YAML library. Convert YAML to JSON first.

Are external $ref URLs resolved?

No. Local JSON Pointer references are handled where the operation needs them, but remote references are not fetched.

Does the result replace a full OpenAPI validator?

No. OpenAPI Response Example Generator performs its documented transformation or audit. Use a standards-aware validator before publishing a specification.

Is the specification uploaded to a server?

No. Processing runs in the current browser tab. The page does not send the pasted document to an API.

Can I download the result?

Yes. Run the tool, then use Download for the primary output or the JSON and CSV buttons when those structured exports are available.

Input contract

ItemRequirement
FormatJSON object
ExecutionLocal browser
Remote refsNot fetched

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