Paste an OpenAPI or Swagger spec and view it as interactive API documentation in seconds. No account, no install. Every render gets a shareable link.
Your rendered API docs will appear here
Paste a spec and click Render docs, or try the sample.
Raw OpenAPI files are hard to read. This online OpenAPI viewer turns a JSON or YAML spec into browsable reference docs: endpoints grouped by tag, request parameters and bodies, response schemas, examples, and generated code snippets. It works with OpenAPI 3.2, 3.1, 3.0 and Swagger 2.0 files, and you never have to create an account to use it.
Yes. Viewing a spec is free and needs no sign-up. Paste, upload, or link a JSON or YAML file and the documentation renders immediately. An account is only needed if you want to publish the docs on a permanent URL.
OpenAPI 3.2, 3.1 and 3.0 are supported, as well as Swagger 2.0. The version is detected from the spec, so there is nothing to configure.
Yes. Every render gets a private, unguessable link that you can send to teammates. The link stays live for 48 hours; publish the docs for free if you need a permanent URL.
The spec is validated on every render and the errors are listed in the Errors tab with line numbers, so you can click one to jump to it. Where possible the documentation is still rendered from the parts that are valid. Only a spec that cannot be parsed at all, or is too broken to build docs from, is not rendered.
It analyses the spec against the documented restrictions of common tools such as OpenAPI Generator, Azure API Management, Hey API and Quicktype, and reports what would block generation, what would be altered, and what is only worth noting. The analysis runs on our side; the spec is never sent to those tools.
It covers the same need — reading a spec as browsable docs — without installing or hosting Swagger UI. You get endpoint navigation, request and response schemas, examples and code snippets from a single paste.
To render the documentation, the spec is saved as a temporary preview that expires after 48 hours. It is not listed anywhere and can only be reached through its link.