🔷 GraphQL Query Formatter & Validator

Format, minify, and validate GraphQL queries

GraphQL Query Input

Result

💡 Usage Tips

Format: Indent and align GraphQL queries for readability
Minify: Remove whitespace to optimize network transfer
Validate: Check syntax errors and display error messages
Example: Load sample Query and Mutation queries

What is GraphQL?

Why is it needed?

GraphQL is a query language for APIs and a runtime for fulfilling those queries with your existing data. It provides a complete and understandable description of the data in your API, gives clients the power to ask for exactly what they need, and makes it easier to evolve APIs over time. Unlike REST APIs that require multiple endpoints, GraphQL allows you to fetch all needed data in a single request, reducing over-fetching and under-fetching of data.

When to use this tool?

Format GraphQL Queries: Make your queries readable and properly indented for better understanding
Validate Syntax: Check if your GraphQL query has correct syntax before sending to the server
Minify for Production: Reduce query size by removing unnecessary whitespace for network optimization
Debug Complex Queries: Format nested queries and mutations to identify structural issues
Learn GraphQL: Study well-formatted examples to understand GraphQL syntax better

Real-world Examples

Example 1: Query Formatting

Before - Minified/Unreadable:

query{user(id:1){id name email posts{id title}}}

↓ After Formatting

query {
  user(id: 1) {
    id
    name
    email
    posts {
      id
      title
    }
  }
}

Example 2: Mutation with Variables

mutation CreatePost($input: CreatePostInput!) {
  createPost(input: $input) {
    id
    title
    content
    createdAt
    author {
      id
      name
    }
  }
}

Example 3: Fragment Usage

fragment UserInfo on User {
  id
  name
  email
}

query GetUsers {
  users {
    ...UserInfo
    posts {
      id
      title
    }
  }
}

Common Mistakes to Avoid

Missing Operation Type: Queries should start with query, mutation, or subscription
Incorrect Brackets: GraphQL uses curly braces { } for selection sets and parentheses ( ) for arguments
Quotes in Strings: GraphQL requires double quotes "text", not single quotes
Variable Syntax: Variables must be prefixed with $ and declared in operation definition
Trailing Commas: Unlike JSON, GraphQL does not require commas between fields

GraphQL vs REST API

Feature	GraphQL	REST
Endpoints	Single endpoint	Multiple endpoints
Data Fetching	Request exactly what you need	Fixed data structure
Versioning	No versioning needed	v1, v2, etc.
Over-fetching	No over-fetching	Common issue

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