Free GraphQL Formatter – Beautify GraphQL Queries Online

Format and beautify GraphQL queries, mutations, subscriptions, and schema definitions. Proper indentation, clean structure, instant results. Free, fast, and browser-based.

What Is a GraphQL Formatter?

A GraphQL formatter automatically reorganizes GraphQL code with proper indentation and structure. It transforms compressed or messy queries into clean, readable format while preserving functionality.

Why Format GraphQL?

Readability: Properly formatted queries are much easier to understand and debug.

Team Collaboration: Consistent formatting across your codebase improves code reviews.

Error Detection: Well-structured queries make syntax errors more visible.

Documentation: Formatted queries are self-documenting and easier to maintain.

How to Use This Tool

Step 1: Paste Your GraphQL

Enter any GraphQL content:

• Queries
• Mutations
• Subscriptions
• Fragments
• Schema definitions

Step 2: Configure Indentation

Choose between 2 or 4 space indentation.

Step 3: Copy or Download

Get your formatted GraphQL instantly.

GraphQL Syntax Support

Queries

Transform compressed queries:

# Input (compressed)
query GetUser($id:ID!){user(id:$id){id name email posts{id title}}}

# Output (formatted)
query GetUser($id: ID!) {
  user(id: $id) {
    id
    name
    email
    posts {
      id
      title
    }
  }
}

Mutations

mutation CreateUser($input: CreateUserInput!) {
  createUser(input: $input) {
    id
    name
    email
    createdAt
  }
}

Subscriptions

subscription OnMessageCreated($channelId: ID!) {
  messageCreated(channelId: $channelId) {
    id
    text
    sender {
      name
      avatar
    }
    createdAt
  }
}

Fragments

fragment UserFields on User {
  id
  name
  email
  avatar {
    url
    width
    height
  }
}

Schema Definitions

type User {
  id: ID!
  name: String!
  email: String!
  posts: [Post!]!
  createdAt: DateTime!
}

type Query {
  user(id: ID!): User
  users(first: Int, after: String): UserConnection!
}

GraphQL Best Practices

Query Structure

Name Your Operations:

# Good - named query
query GetUserProfile($id: ID!) {
  user(id: $id) {
    ...UserFields
  }
}

# Avoid - anonymous query
{
  user(id: "123") {
    name
  }
}

Use Variables:

# Good - parameterized
query GetPosts($first: Int!, $category: String) {
  posts(first: $first, category: $category) {
    id
    title
  }
}

# Avoid - hardcoded values
query {
  posts(first: 10, category: "tech") {
    id
    title
  }
}

Field Selection

Request Only Needed Fields:

# Good - specific fields
query GetUserName($id: ID!) {
  user(id: $id) {
    name
  }
}

# Avoid - over-fetching
query GetUserName($id: ID!) {
  user(id: $id) {
    id
    name
    email
    avatar
    posts
    comments
    followers
  }
}

Fragments for Reusability

fragment PostCard on Post {
  id
  title
  excerpt
  author {
    name
    avatar
  }
  createdAt
}

query GetFeed($first: Int!) {
  posts(first: $first) {
    ...PostCard
  }
}

query GetUserPosts($userId: ID!) {
  user(id: $userId) {
    posts {
      ...PostCard
    }
  }
}

GraphQL vs REST Formatting

Common GraphQL Patterns

Pagination

query GetPosts($first: Int!, $after: String) {
  posts(first: $first, after: $after) {
    edges {
      node {
        id
        title
      }
      cursor
    }
    pageInfo {
      hasNextPage
      endCursor
    }
  }
}

Error Handling

mutation CreatePost($input: CreatePostInput!) {
  createPost(input: $input) {
    ... on Post {
      id
      title
    }
    ... on ValidationError {
      field
      message
    }
    ... on NotFoundError {
      message
    }
  }
}

Inline Fragments

query GetSearchResults($query: String!) {
  search(query: $query) {
    ... on User {
      id
      name
      avatar
    }
    ... on Post {
      id
      title
      excerpt
    }
    ... on Comment {
      id
      text
    }
  }
}

Frequently Asked Questions

Does this validate GraphQL?

This tool formats code but doesn't validate against a schema. Use GraphQL IDE or CLI for validation.

Can it format schema definitions?

Yes! Type definitions, interfaces, enums, and directives are all supported.

Is my query sent to a server?

No. All formatting happens locally in your browser.

Does it preserve comments?

Yes. Comments are preserved with proper indentation.

Can I format multiple operations?

Yes. Multiple queries, mutations, and fragments format correctly.