API & OpenAPI utility

OpenAPI Schema Viewer

Inspect component schemas, fields, required values, and references.

● This tool runs entirely in your browser. Your input is never uploaded to our servers.

OpenAPI YAML or JSON

Output

Your result will appear here…

How to use OpenAPI Schema Viewer

Paste an OpenAPI document with component schemas.
Select View Schemas to summarize each component.
Review property types and required markers.

Example

Input:

openapi: 3.0.3
info:
  title: Example API
  version: 1.0.0
paths: {}
components:
  schemas:
    User:
      type: object
      required: [id, name]
      properties:
        id:
          type: integer
        name:
          type: string

Output:

User
  id: integer (required)
  name: string (required)

Use cases

Inspect models in an API contract.
Review required fields before generating clients.
Find schemas by name in a large specification.

About this tool

Inspect component schemas, fields, required values, and references. Processing happens locally in your browser, so your input is not sent to a server or included in analytics.

Frequently asked questions

Does the viewer resolve $ref links?

It displays reference strings but does not fully resolve referenced schemas.

Can it show inline response schemas?

It focuses on components.schemas; inline operation schemas are not expanded in this summary.

Does the specification leave my browser?

No. Schema inspection is performed locally.