http.ist is a nicely formatted reference of HTTP 1.1 from RFC 7231.
This site is made with love by Ben Johnson. It contains snippets of the RFC 7231 spec with notes and links to reference materials. More parts of the spec may be covered in the future.
You can link directly to a status code by its number. For example: https://http.ist/201.
Any comments, concerns, or suggestions can be sent to firstname.lastname@example.org.