GraphQL Playground is an interactive development environment and API client used for writing, testing, and debugging GraphQL queries, mutations, and subscriptions. It functions as a visual tool for executing requests against a GraphQL server and inspecting the resulting JSON responses.
The project includes a documentation browser for exploring schemas and an editor with autocompletion and error highlighting. It provides specialized capabilities for analyzing API performance through tracing visualization and supports real-time data updates via subscription streaming.
The environment allows for switching between multiple API endpoints and project configurations. Users can share specific request states and headers through URL-encoded workspace snapshots to facilitate collaborative API testing.
The interface can be embedded directly into a web server using middleware integration.