OpenAPI Viewer

Paste OpenAPI or Swagger JSON/YAML and inspect paths, methods, servers, and schemas locally.

OpenAPI viewer workspace

Inspect OpenAPI or Swagger JSON/YAML locally.

OpenAPI input

Summary JSON

{
  "operations": [
    {
      "label": "GET /tools",
      "method": "GET",
      "path": "/tools",
      "summary": "List tools",
      "tags": [
        "Tools"
      ]
    },
    {
      "label": "POST /tools",
      "method": "POST",
      "path": "/tools",
      "summary": "createTool",
      "tags": []
    },
    {
      "label": "DELETE /tools/{id}",
      "method": "DELETE",
      "path": "/tools/{id}",
      "summary": "Delete tool",
      "tags": []
    }
  ],
  "schemaNames": [
    "Tool"
  ],
  "servers": [
    "https://api.example.com"
  ],
  "specVersion": "3.1.0",
  "stats": {
    "methods": 3,
    "operations": 3,
    "paths": 2,
    "schemas": 1
  },
  "title": "Utilumo API",
  "version": "1.0.0"
}

API summary updated live

Document is parsed locally in this browser tab.

Utilumo API 1.0.0

2 paths3 operations3 methods1 schemas

Operations

GET/tools
List tools
Tools
POST/tools
createTool
DELETE/tools/{id}
Delete tool

Servers and schemas

Servers

https://api.example.com

Schemas

Tool

Files are processed in your browser. No data is uploaded.

Questions

Does OpenAPI Viewer upload my API spec?

No. Pasted OpenAPI and Swagger documents are parsed in your browser tab and are not uploaded.

Does it support Swagger 2.0?

Yes. It reads Swagger 2.0 documents and summarizes paths, methods, servers, and definitions.

Can it call my API?

No. This viewer only inspects the document. Use REST Request Tester or cURL Generator when you want to test a live endpoint.

Does Utilumo upload my input?

No. Utilumo has no backend that could receive your input. Where a tool makes a request as part of its function, it goes directly from your browser to the destination you choose, never through Utilumo.

Do I need an account?

No. Utilumo tools are built to work without accounts or sign-in.