Explore APIs
in plain text.

HTTP Lion is a desktop HTTP client built around plain-text documents. Write requests, run them, and inspect the responses in one place.

HTTP Lion for Windows

Coming soon to the Microsoft Store.

See how it works

01 / THE WORKBENCHWRITE REQUESTS. RUN THEM. INSPECT THE RESPONSE.

HTTP Lion with three plain-text API requests and a JSON response shown in the Tree inspector.

02 / WORKFLOW

Working with requests

Write your requests in a text file. Run them directly from HTTP Lion and inspect the result without leaving the document.

Keep related requests together

A document can contain one request or many. Use regions to organize larger documents and quickly move between requests.

Variables and environments

Use variables in your requests and switch between named environments without changing the request itself. For browser-based authentication, each document has its own cookie session.

Inspect requests and responses

See the request that was sent and the response that came back, including headers and body. View supported content in a suitable format, or inspect the original response using Raw or Hex view.

03 / LICENSING

Free for non-professional use.

HTTP Lion is free to use for personal projects, learning, and other non-professional work.

A paid license will be required for professional use. Professional licensing is not yet available.