A simple, easy to use HTTP client to send API requests from within Chrome and see formatted, syntax highlighted responses.
Great for testing and debugging JSON and XML APIs, RESTful APIs, GraphQL APIs, web services, web applications and more.
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
Change the colour theme to suit your work environment.
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.
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.
New and improved:
Completely re-written, new styling, layout, colours, additional features and improved performance.
100% open source
Source code is available from GitHub.