How to Test GraphQL Queries Online
Test GraphQL queries, mutations, and subscriptions against any endpoint. Free online GraphQL playground with syntax highlighting, variables support, and response inspection.
Open API Tester →Step-by-Step Guide
Enter your GraphQL endpoint
Paste your GraphQL API URL into the endpoint field. This is typically something like https://api.example.com/graphql. Add any required headers like Authorization tokens or API keys in the headers section.
Write your query
Type your GraphQL query in the editor. Start simple — try a basic query like { users { id name email } } to verify the connection works. The tool provides syntax highlighting to catch errors as you type.
Add variables if needed
For parameterized queries, add variables in JSON format. For example, if your query uses $id: ID!, set variables to { "id": "123" }. This keeps your queries reusable and mirrors how your app will call the API.
Execute and inspect the response
Hit send to execute the query. Review the JSON response — check the data shape matches your expectations, look for errors in the "errors" array, and verify nested relationships resolve correctly. Copy the response for documentation or debugging.
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