🚀 Build GraphQL Queries Visually
GraphQL is a query language for APIs that gives clients the power to ask for exactly what they need. Use this interactive tool to build, test, and learn GraphQL queries without writing code from scratch. Perfect for developers learning GraphQL or quickly prototyping queries.
🔧 Query Builder
📝 Generated Query
💡 Common GraphQL Query Examples
Basic Query
Fetch specific fields from a resource
query GetUser {
user(id: "1") {
id
name
email
}
}
Nested Query
Query related resources
query GetUserPosts {
user(id: "1") {
name
posts {
title
content
}
}
}
Mutation
Create or update data
mutation CreatePost {
createPost(
title: "Hello"
content: "World"
) {
id
title
}
}
Query with Variables
Use variables for dynamic queries
query GetUser($id: ID!) {
user(id: $id) {
name
email
}
}
Using Fragments
Reuse field selections
fragment UserInfo on User {
id
name
email
}
query {
user(id: "1") {
...UserInfo
}
}
Field Aliases
Rename fields in response
query {
firstUser: user(id: "1") {
name
}
secondUser: user(id: "2") {
name
}
}
📚 GraphQL Key Concepts
🎯 Queries
Queries are used to read or fetch data. They're equivalent to GET requests in REST. You specify exactly which fields you want, and GraphQL returns only those fields.
✏️ Mutations
Mutations are used to modify data (create, update, delete). They're similar to POST, PUT, PATCH, and DELETE in REST APIs. Mutations can also return data after the operation.
🔔 Subscriptions
Subscriptions enable real-time updates. When data changes on the server, subscribed clients receive updates automatically via WebSocket connections.
📋 Schema
The schema defines the structure of your API, including types, fields, queries, and mutations. It acts as a contract between client and server.
🔍 Resolvers
Resolvers are functions that handle fetching data for each field in your schema. They connect your schema to your data sources.
⚡ Advantages
GraphQL eliminates over-fetching and under-fetching, provides strong typing, enables powerful developer tools, and allows clients to request exactly what they need in a single request.