OpenAPI Viewer

Visualize, explore, and improve your OpenAPI 3.x specifications.

Browser-only

No data sent to any server. Your specs stay on your machine.

Color-coded schemas

Optional, anyOf, oneOf, and allOf branches rendered with distinct colors.

Instant suggestions

Catches missing descriptions, summaries, examples, and error responses.

OpenAPI Viewer

Use the OpenAPI Viewer to visualize OpenAPI 3.x JSON or YAML specifications in the browser. Browse endpoints, parameters, request bodies, response schemas, and improvement suggestions without sending API specs to a server.

What this tool helps with

  • Upload OpenAPI 3.x JSON or YAML specifications.
  • Browse endpoints grouped by tag with method, path, summary, and schema details.
  • Find missing descriptions, examples, operation IDs, servers, and error responses.