JSON Formatter for OpenAPI 3.x Specifications
Quick Answer: Paste your OpenAPI 3.x specification JSON to get clean formatting. OpenAPI specs typically have complex nested structures with $ref references, schema compositions, and deeply nested requestBody/response definitions.
FAQ
What is the difference between Swagger and OpenAPI?
Swagger refers to version 2.0. OpenAPI is version 3.0+ maintained by the OpenAPI Initiative. The JSON structure differs between them.
How large can OpenAPI specs get?
Production API specs routinely reach 5,000-50,000 lines. The formatter handles large files entirely in your browser.