Home › Resources & tools › GraphQL Validator

GraphQL Validator

GraphQL schema (SDL)

type Query {
  user(username: String): User
}

type User {
  username: String!
  friends: [User!]!
}1
type Query {
2
  user(username: String): User
3
}
4

5
type User {
6
  username: String!
7
  friends: [User!]!
8
}

GraphQL query

query {
  user(username: "alice") {
    friends {
      username
    }
  }
}1
query {
2
  user(username: "alice") {
3
    friends {
4
      username
5
    }
6
  }
7
}

Validation result

The GraphQL query validates successfully against the provided schema.

See also

GraphQL Schema Validator

Check the validity of GraphQL schemas.

Awesome GraphQL

A curated list of awesome resources on GraphQL.

GraphQL Parse Tree Viewer

Visualize the parse tree of a GraphQL document.

GraphQL AST Viewer

Visualize the abstract syntax tree (AST) of a GraphQL document.

GraphQL validation

A short explanation of GraphQL schemas, queries, and validation.

A GraphQL client that can be used to interact with a GraphQL server.

GraphQL Formatter

Beautify GraphQL code.

© 2025 Leskoff

Terms of service Privacy policy

All prices listed are in United States Dollars (USD). Visual representations of products are intended for illustrative purposes. Actual products may exhibit variations in color, texture, or other characteristics inherent to the manufacturing process.