Open-source alternatives to Openapi Style Validator

OpenAPI-GUI

Utility for comparing two OpenAPI specifications.

This project is a command-line tool and template-based scaffolding engine that transforms API interface specifications into functional client libraries and server stubs. By automating the creation of type-safe SDKs and boilerplate code, it bridges the gap between service definitions and implementation, allowing developers to maintain synchronized codebases across many programming languages. The tool distinguishes itself through a portable execution model that utilizes containerized build isolation to ensure identical output regardless of the host environment. It features a modular, plugin-bas

Command-line utility from @Redocly with OpenAPI superpowers. Build, manage and quality-check OpenAPI descriptions, configure and execute API governance, and publish beautiful API documentation. Supports OpenAPI 3.1, 3.0 and OpenAPI 2.0 (legacy Swagger format).

Spectral is a programmable linting engine and validation tool designed to enforce style guidelines and schema correctness within OpenAPI specifications and JSON configuration files. It functions as a rule-based validator that analyzes structured text files to ensure data consistency and adherence to predefined constraints. The engine utilizes a configuration-driven execution model, allowing users to manage pluggable rule sets and integrate JSON Schema definitions. It supports the creation of custom function-based rules to define complex validation logic beyond static declarations. The projec

Swagger Editor is a web-based authoring tool and development environment used to design, document, and validate API specifications. It specifically supports the OpenAPI Specification, providing a browser interface for writing API schemas and verifying their structure. The tool features real-time rendering that produces a visual preview of the API documentation as the specification is edited. It includes syntax highlighting based on standardized schemas to improve the readability of the API definitions. The editor supports importing specifications from files, external URLs, or example fixture

Swagger UI is an OpenAPI specification renderer and documentation interface that transforms JSON or YAML API definitions into a navigable, searchable website. It functions as an OpenAPI documentation UI and request client, providing a visual catalog for exploring endpoints and sending live HTTP requests to a server using a schema-defined interface. The project distinguishes itself through a plugin-based extension system and a schema-driven UI generation model. This architecture allows for the injection of custom components, state selectors, and helper functions to modify core behavior and lay

Zally is a quality assurance tool. It's a linter for OpenAPI specifications, it performs the following tasks :