OpenAPI / Swagger JSON Viewer

Paste your Swagger or OpenAPI 3.0+ JSON specification to instantly render readable endpoints, parameters, and responses.

Swagger/OpenAPI JSON Input

{
  "openapi": "3.0.0",
  "info": {
    "title": "Sample Sample API",
    "version": "1.0.0",
    "description": "An example API specification"
  },
  "paths": {
    "/api/users": {
      "get": {
        "summary": "Get all users",
        "parameters": [
          {
            "name": "limit",
            "in": "query",
            "description": "Number of users to return",
            "required": false,
            "schema": { "type": "integer" }
          }
        ],
        "responses": {
          "200": { "description": "Successful operation" }
        }
      },
      "post": {
        "summary": "Create a new user",
        "responses": {
          "201": { "description": "User created successfully" }
        }
      }
    }
  }
}

Parsed Specification Overview

No spec loaded

Paste a valid OpenAPI JSON above and click "Parse & Visualize".

What is OpenAPI and Swagger JSON Viewer?

An OpenAPI or Swagger JSON viewer makes an API specification easier to inspect by presenting endpoints, operations, parameters, schemas, and responses in a readable format.

How to use this tool

Paste a valid OpenAPI or Swagger JSON document, load it, then explore endpoints and schema definitions. Validate syntax before diagnosing specification errors.

Useful notes

Check the specification version, required fields, server URLs, and referenced schemas when a document does not render as expected.

Frequently Asked Questions (FAQ)

Yes. The tool is designed to process the values you enter locally in your browser.

Review the generated output in the context where you will use it, especially for syntax, encoding, and sensitive values.