OpenAPI Toolkit

Validate, convert, diff, fix, and join OpenAPI specifications directly in your browser.

Validate

Check your OpenAPI specification for errors and warnings with detailed feedback.

Validate Spec

Convert between OpenAPI versions: 2.0, 3.0, 3.1, and 3.2.

Convert Spec

Compare two specifications and identify breaking changes.

Compare Specs

Automatically fix common issues in your OpenAPI specification.

Fix Spec

Merge multiple OpenAPI specifications into a single document.

Join Specs

Apply OpenAPI Overlay transformations to your specification.

Apply Overlay