GraphQL Query Builder & Request Tester

An interactive GraphQL query builder and API tester. Visually select operation types, root queries, field properties, and arguments. Test queries live against GraphQL endpoints and export ready-to-use client snippets for Apollo Client, Fetch API, urql, Python, and cURL.

How to Build & Test GraphQL Queries

GraphQL Query Builder is an interactive client-side tool for constructing, testing, and exporting GraphQL queries, mutations, and subscriptions.

1. Operation & Field Selection

  • Operation Types: Choose between query, mutation, and subscription.
  • Root Query Selector: Pick target root queries (e.g. countries, country, products, user).
  • Interactive Field Tree: Check or uncheck scalar properties and nested object relationships (continent, languages, reviews, repositories) to dynamically shape your GraphQL payload.

2. Query Arguments & Variables

  • Define field arguments directly (code: "US", limit: 10, username: "octocat").
  • Pass variables and custom HTTP headers for authenticating with GraphQL APIs requiring Bearer tokens or API keys.

3. Live Execution & Testing

  • Send live POST requests directly to GraphQL endpoints (such as the Countries API https://countries.trevorblades.com/graphql) to inspect real-time JSON responses and query latency.

4. Code Generation & Client Exports

  • Apollo Client (@apollo/client): Export typed gql tag definitions and useQuery hooks.
  • Fetch API: Clean, zero-dependency native JavaScript fetch() request snippets.
  • urql: Ready-to-use urql React query component syntax.
  • Python (requests): Python scripts for backend data fetching.
  • cURL: Terminal commands for manual API testing.

Key Features

  • Visual Operation & Field Selector: Build queries, mutations, and subscriptions by checking/unchecking fields and arguments in an interactive tree.
  • Live Endpoint Execution: Test live queries against any custom GraphQL endpoint or public GraphQL APIs with variable and header support.
  • Multi-Framework Code Generator: Instantly export query snippets for Apollo Client, Fetch API, urql, Python, and cURL.
  • Header & Variable Management: Add custom HTTP authorization headers and JSON variables for authenticated GraphQL APIs.

Common Use Cases

  • GraphQL API Exploration & Prototyping: Visually building and testing queries against GraphQL APIs without setting up GraphiQL or Playground locally.
  • Client Code Generation: Generating ready-to-use fetch, Apollo Client, urql, Python, or cURL code snippets for frontend and backend integration.
  • Debugging API Payloads: Inspecting query response payloads, monitoring request latency, and testing variable inputs against live endpoints.
  • Learning GraphQL Syntax: Interactive visual interface to learn how operations, selections, aliases, and arguments map to raw GraphQL query strings.

Frequently Asked Questions

Does this tool send my query data to an external server?

No! GraphQL Query Builder runs entirely in your browser. Live execution requests are sent directly from your browser to your specified target GraphQL endpoint URL.

Can I test custom GraphQL endpoints?

Yes. Simply type your custom GraphQL server URL into the Target Endpoint URL field to execute queries against your local or staging server.

Related Tools

Encoding

cURL Command Builder & Request Generator

Visually construct, parse, test, and convert cURL commands into multi-language code snippets.

Encoding

JSONPath Explorer & Evaluator

Query, evaluate, filter, and extract nodes from JSON payloads with an interactive tree view.

Encoding

Mock API & Data Generator

Build custom REST schemas, generate realistic mock JSON data, test simulated endpoints, and export MSW or Express code.

JSON

JSON Formatter

Pretty print, format, and sort keys of your JSON data.