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How to Validate GraphQL Schemas - Step by Step Guide

Step 1: Input Your GraphQL Schema

Paste your GraphQL schema definition, upload a .graphql or .gql file, or use the sample data to test the validator.

  • •Paste schema directly from your code editor
  • •Upload .graphql or .gql files
  • •Click "Sample" to load example schema

Example GraphQL Schema

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

type Post {
  id: ID!
  title: String!
  content: String!
  author: User!
}

Step 2: Automatic Schema Validation

The validator performs automatic schema checking and displays results in real-time.

  • •Validates GraphQL schema syntax
  • •Verifies type definitions and references
  • •Reports errors with line numbers
  • •Checks interface and union types

Step 3: Review Validation Results

View validation results with detailed error messages and schema statistics.

  • •Success indicator for valid schemas
  • •Error messages with line numbers
  • •Schema statistics and type counts

Step 4: Fix and Re-validate

Make corrections and download or copy the validated schema.

  • •Real-time validation as you edit
  • •Download validated schema
  • •Copy to clipboard

Frequently Asked Questions

How do I validate a GraphQL schema?

Simply paste your GraphQL schema definition into the validator. The tool automatically checks syntax, validates type definitions, and ensures all field types are properly defined. You'll get instant feedback with detailed error messages if any issues are found.

What does the GraphQL schema validator check?

The validator checks syntax correctness, type definitions, field types, interface implementations, union types, directive usage, and ensures all type references exist. It also validates schema structure according to GraphQL specification standards.

Can I validate large GraphQL schemas?

Yes! The validator handles large schema files efficiently, including schemas with hundreds of types, interfaces, and complex relationships. Perfect for enterprise-level GraphQL APIs and microservices architectures.

Does this work with Apollo GraphQL schemas?

Yes. The validator works with all GraphQL schema formats including Apollo Server, GraphQL Yoga, Hasura, AWS AppSync, and any other GraphQL implementation that follows the official specification.

Is my GraphQL schema data secure?

Yes! All validation happens in your browser. Your schema data never leaves your computer or touches our servers. This is a client-side tool that provides complete privacy for your GraphQL schema definitions.

Is the GraphQL schema validator free?

Yes, completely free with no limitations on schema size, validation frequency, or features. No registration required, and you can validate unlimited GraphQL schemas with detailed error reporting and suggestions.

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