Dev

Fake GraphQL Query Generator

This fake GraphQL query generator creates complete, syntactically correct GraphQL operations for any resource type you specify — saving you the tedious work of hand-writing boilerplate for testing, prototyping, or documentation. Enter a type name like "User" or "Product", choose whether you want queries, mutations, subscriptions, or all operation types, and set how many fields to include per type. The generator outputs a ready-to-use set of operations you can paste directly into Apollo Client, GraphQL Playground, or Insomnia. Each generated operation follows real GraphQL conventions: list queries include Relay-style cursor pagination with a pageInfo block, mutations accept typed input variables, and subscriptions use the correct WebSocket-friendly syntax. Field names are drawn from a realistic pool of common property names, so the output reads like something a developer actually wrote rather than a placeholder stub. For API documentation, these operations give technical writers a concrete starting point that accurately reflects GraphQL structure without requiring a live schema. For testing, they let you scaffold mock resolvers or MSW handlers quickly, especially useful when your backend schema is still in flux and you need frontend development to proceed in parallel. Adjust the field count to control verbosity — fewer fields produce minimal queries ideal for unit tests, while higher counts generate rich examples suited for documentation or schema exploration demos. Because the output is plain text, you can copy it straight into a .graphql file, a Jest test fixture, or a Storybook story with zero reformatting required.

How to Use

  1. Type your GraphQL type name into the Resource field using PascalCase, such as "Product" or "OrderItem".
  2. Select an operation type from the dropdown: choose "all" for the full CRUD set, or pick a specific type like "mutation" to generate only those operations.
  3. Set the Fields per Type number to control selection set size — use 3–5 for lean test fixtures or 7–10 for documentation examples.
  4. Click Generate and review the output panel, which contains one complete GraphQL operation block per selected type.
  5. Copy the output and paste it into your .graphql file, test fixture, MSW handler, or GraphQL Playground tab.

Use Cases

  • •Generating MSW mock handlers for GraphQL endpoints in frontend tests
  • •Scaffolding Apollo Client useQuery and useMutation code examples
  • •Creating realistic query fixtures for Jest or Vitest snapshot tests
  • •Populating Insomnia or Postman GraphQL collections with sample operations
  • •Writing GraphQL sections in API reference documentation quickly
  • •Teaching students the structural difference between queries, mutations, and subscriptions
  • •Prototyping frontend components before the backend GraphQL schema is finalized
  • •Generating placeholder operations for GraphQL gateway integration tests

Tips

  • →Set resource to match your exact type name — the generator uses it as the operation name prefix, so "BlogPost" produces GetBlogPost and CreateBlogPost, keeping output paste-ready.
  • →Use fieldCount of 3–4 when generating fixtures for unit tests; bloated selection sets make snapshot diffs noisy and harder to maintain.
  • →Generate the "all" operation type first to get the full picture, then re-run with a specific type selected to get a cleaner block for documentation or a single test file.
  • →The list query's pageInfo and edges structure is Relay-compatible — if you're using Apollo Client with a Relay-style cache policy, the pagination logic maps directly without modification.
  • →Combine multiple runs with different resource names to build a complete mock API layer: generate User, Post, and Comment operations separately, then assemble them into a single MSW handler file.
  • →If your schema uses snake_case field names rather than camelCase, do a quick find-and-replace on the output before committing — the generator always produces camelCase to match GraphQL convention.

FAQ

What is the difference between a GraphQL query and a mutation?

Queries are read-only operations that fetch data without side effects. Mutations modify server-side state — creating, updating, or deleting records — and conventionally return the affected object so the client can update its cache. GraphQL enforces this separation semantically, though both are technically sent as HTTP POST requests.

What is a GraphQL subscription and when should I use one?

A subscription is a persistent operation that opens a WebSocket connection and pushes updates to the client whenever specified data changes on the server. Use subscriptions for live features like chat messages, real-time dashboards, or collaborative editing. For most data-fetching needs, queries with polling are simpler and sufficient.

Can I run these generated queries against my actual GraphQL API?

Not directly. The generated field names are sampled from a generic pool and won't match your schema exactly. Treat the output as a structural template — the syntax, operation names, variable declarations, and pagination patterns are all valid, but you'll need to replace field names with ones your schema actually defines.

What does the pageInfo block in the list query mean?

pageInfo follows the Relay cursor-based pagination specification. It returns hasNextPage (boolean) and endCursor (an opaque string) so your client can request the next page by passing endCursor as the after argument. This approach is more efficient than offset pagination for large or frequently changing datasets.

How do I change the resource type to match my own schema?

Type your schema's type name into the Resource field — for example, "Order", "BlogPost", or "PaymentMethod". The generator uses that name for the operation name, the return type, and the input type on mutations. Use PascalCase to match GraphQL conventions.

What does the fieldCount input control exactly?

fieldCount sets how many fields are included in each operation's selection set. Lower values (3–4) produce minimal queries good for unit tests; higher values (8–10) produce fuller examples suited for documentation. Each operation gets its own random sample from the field pool, so list and single-fetch queries won't always have identical fields.

Can I generate only mutations without queries or subscriptions?

Yes. Use the Operation Type dropdown to select a specific type — query, mutation, or subscription — instead of the default "all" option. This is useful when you only need mutation fixtures for a test file or want to document just the write operations for a particular resource.

How do I use the output in an MSW (Mock Service Worker) handler?

Copy the generated operation, then create an MSW graphql.query() or graphql.mutation() handler using the operation name as the key. Pair it with a matching mock resolver that returns data shaped to the generated fields. The operation name follows a consistent pattern like GetUser or CreateUser, making handler wiring straightforward.