OpenAPI Viewer

Load, inspect, and test an OpenAPI or Swagger spec with live snippets.

Keep your API workflow moving in Postly

Review your API spec here, then use Postly to manage product messaging, docs promotion, and publishing from one dashboard.

Paste OpenAPI JSON or YAML

Drag and drop a .json or .yaml file here

Server base URL

Import from URL

Endpoints

Load a spec to list endpoints.

Code snippets

Select an endpoint to generate snippets.

Snippets will appear here after you choose an endpoint.

Support the tool and keep publishing moving

Use Postly for social media management and content workflows, then support the project below.

This tool is free — but it runs on real servers, real APIs, and real costs.
If it helped you even once, consider supporting Postly.

Faster downloads Stable uptime More free tools

No pressure — tools stay free for everyone.