GraphQL Query Builder Online — Free GraphQL Playground

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How to GraphQL Query Builder Online

1. 1

   Enter your GraphQL API endpoint URL in the URL bar at the top.

2. 2

   Write your GraphQL query in the query editor, or click 'Introspect Schema' to explore available types and fields.

3. 3

   Add query variables as JSON in the Variables tab if your query uses parameterized inputs.

4. 4

   Add custom headers (e.g., Authorization) in the Headers tab for authenticated APIs.

5. 5

   Click Execute or press Cmd+Enter to run the query and view the formatted response.

GraphQL Query Builder Features

• ✓

  Full GraphQL query editor with syntax validation and prettify support.

• ✓

  Schema introspection to browse all types, fields, and arguments from any GraphQL endpoint.

• ✓

  Variables editor for parameterized queries with JSON validation.

• ✓

  Custom headers support for authenticated GraphQL APIs (Bearer token, API key, etc.).

• ✓

  Response visualization with syntax-highlighted JSON, GraphQL error highlighting, and timing.

• ✓

  Multiple operation support with operation name selector dropdown.

• ✓

  Query history storing your last 30 queries for one-click replay.

• ✓

  Copy query as cURL command for sharing or use in scripts.

• ✓

  Server-side proxy for CORS bypass — query any GraphQL API without browser restrictions.

• ✓

  AI-powered query suggestions, error explanations, and optimization tips.

• ✓

  Keyboard shortcuts for fast workflow: Cmd+Enter to execute, Cmd+Shift+P to prettify.

• ✓

  Pre-loaded example endpoints (Countries API, SpaceX API, Rick & Morty API) to try immediately.

Frequently Asked Questions

Is this a replacement for GraphiQL or Apollo Studio?

It is a lightweight alternative for quick GraphQL query testing directly in your browser. For complex workflows, schema management, and team collaboration, dedicated GraphQL IDEs like GraphiQL or Apollo Studio are still recommended. DevFlow GraphQL Query Builder is ideal for fast, ad-hoc queries during development.

Does it support mutations and subscriptions?

Yes, queries and mutations are fully supported. Subscriptions (WebSocket-based) are not supported in the initial version since they require persistent connections.

Why does it use a server proxy?

Browsers enforce CORS security policy which blocks most cross-origin requests. Without a proxy, queries to external GraphQL APIs would fail with CORS errors. Our server-side proxy forwards your request and never stores any data.

Can I explore the schema without writing queries?

Yes. Click 'Introspect Schema' to fetch the full schema from your endpoint. You can then browse all types, fields, arguments, and descriptions in the Schema Explorer tab.

How does query history work?

The last 30 queries you execute are saved to your browser's localStorage. Click the History button to view and replay any previous query. History is stored locally and never sent to any server.

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