How does this GraphQL query builder operate?

It parses GraphQL Schema Definition Language (SDL) client-side into an AST, extracts query and mutation root types, and lets you toggle fields with checkboxes to generate syntax-accurate GraphQL requests.

Is my GraphQL schema sent to external servers?

No. The entire schema parser and query generator run in your local browser sandbox. No proprietary schemas, endpoint definitions, or field data are transmitted over the internet.

Free Online GraphQL Query Builder & Schema Explorer

1. GraphQL Schema (SDL)

Ready

2. Select Fields

Parse a schema to pick fields

3. Generated Query

# Generated GraphQL query will appear here...

SIMULATED cURL COMMAND:

curl -X POST https://api.example.com/graphql -H "Content-Type: application/json" -d '{"query": ""}'

Building Efficient GraphQL Queries from Schemas

GraphQL schemas define a typed contract between client applications and server APIs. Unlike REST APIs with rigid fixed-shape payloads, GraphQL enables clients to request specifically the fields required for each view, eliminating over-fetching and under-fetching.

How Field Selection Operates

Selection Sets: When querying complex object types, scalar fields (String, Int, Boolean, ID) terminate the selection path, while object fields require nested selection sets.
Arguments: Fields can accept named arguments (e.g. limit: 10, id: "usr_1") to filter, paginate, or mutate data.
Root Operations: Schemas define entry point types: Query for read-only fetches, Mutation for writes, and Subscription for real-time events.