JaSON is a Google Chrome extension for testing APIs and making HTTP network requests.
It is available to install from the Chrome Web Store:
https://chrome.google.com/webstore/detail/oealdlhfjifhgbmjnenhkgffglaibojf
Automatically sends cookies from Chrome. This is extremely handy for APIs which require authentication. Simply authenticate via your browser as normal and JaSON will send cookies for requests which match.
GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS
Keeps request history with full text search. Individual history items can be deleted, or marked as a "favourite" for easy access. History from previous versions of JaSON will be automatically migrated. Stores history in IndexedDB for improved performance.
Change the colour theme to suit your work environment.
Provides an IDE like experience when editing request body and headers. Automatically formats request/response body syntax and colour based on content type.
Supports JSON, XML, and form encoded data by default. Additional content types can be used by setting a custom content type header.
Completely re-written, new styling, layout, colours, additional features and improved performance.
Source code is available from GitHub.
Privacy policy is available here