What does the OpenAPI Validator do?

A formal API specification linter. Validates OpenAPI 3.0, 3.1, and Swagger 2.0 definitions against official schemas, identifying missing required fields, invalid parameter definitions, broken `$ref` schema pointers, duplicate paths, and formatting issues with line-number diagnostics.

OpenAPI Validator | Web Development Suite

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OpenAPI Validator - Tool Overview

Validate OpenAPI 3.0, 3.1, and Swagger 2.0 specifications in JSON or YAML format with syntax, schema, and structural linting.

Category: api-and-database-tools

Best used when: Use this tool to validate API documentation before publishing, audit OpenAPI contracts in CI/CD build steps, check Swagger schemas for gateway compatibility, or debug documentation generation errors.

Summary: Validate OpenAPI 3.0, 3.1, and Swagger 2.0 specifications in JSON or YAML format with syntax, schema, and structural linting.

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Web Development Suite is an online developer productivity platform providing over 114+ tools for code validation, format conversion, code generation, and performance optimization.

The platform is designed for professional web developers, frontend engineers, and full-stack developers who want fast, privacy-first tools without installing software or switching between multiple websites.

The product offers both monthly and yearly subscription plans and supports common development tasks such as code generation, validation, conversion and optimization.