---
title: OpenAPI Validator | usedocs
description: Paste an OpenAPI 3 JSON or YAML document and validate structure locally in the browser. Free OpenAPI validator.
image: "https://usedocs.app/og.png"
url: "https://usedocs.app/tools/openapi-validator"
---

# OpenAPI validator

Paste OpenAPI 3.x JSON and check required fields, paths, and operation shapes. Client-side only — nothing is uploaded.

## What this checks

openapi version, info.title/version, paths object, operations (summary, responses), and basic component refs. For full linting use Spectral in CI; this tool is a fast first pass.

```json
[
  {
    "@context": "https://schema.org",
    "@type": "BreadcrumbList",
    "itemListElement": [
      {
        "@type": "ListItem",
        "position": 1,
        "name": "Home",
        "item": "https://usedocs.app/"
      },
      {
        "@type": "ListItem",
        "position": 2,
        "name": "Free tools",
        "item": "https://usedocs.app/tools/"
      },
      {
        "@type": "ListItem",
        "position": 3,
        "name": "OpenAPI Validator",
        "item": "https://usedocs.app/tools/openapi-validator"
      }
    ]
  },
  {
    "@context": "https://schema.org",
    "@type": "WebPage",
    "name": "OpenAPI Validator | usedocs",
    "url": "https://usedocs.app/tools/openapi-validator",
    "dateModified": "2026-08-11",
    "isPartOf": {
      "@type": "WebSite",
      "name": "usedocs.app",
      "url": "https://usedocs.app/"
    }
  },
  {
    "@context": "https://schema.org",
    "@type": "SoftwareApplication",
    "name": "OpenAPI Validator",
    "applicationCategory": "DeveloperApplication",
    "offers": {
      "@type": "Offer",
      "price": "0",
      "priceCurrency": "USD"
    }
  }
]
```