π Input GraphQL Schema or Query
π Formatted Output
π Schema Analysis
Enter a Schema and click "Parse Schema" to view type structure
π GraphQL Guide
What is GraphQL
GraphQL is an API query language and runtime open-sourced by Facebook in 2015. It allows clients to precisely specify the data they need, avoiding the common over-fetching and under-fetching problems of REST APIs. GraphQL uses a strong type system to define data structures and supports three operation types: Query, Mutation, and Subscription.
Core Concepts
- Schema: Type system definition describing all data types and operations supported by the API
- Query: Read-only operation to fetch data
- Mutation: Write operation to modify data
- Subscription: Real-time operation to listen for data changes
- Resolver: Functions that provide data for each field
- Fragment: Reusable field collections
GraphQL Explorer in 3 steps
- Select mode: Schema (SDL) or Query
- Paste GraphQL code into the input area
- Click "Format" to beautify the code
- Click "Parse Schema" to view type structure
- Copy the result or download as a file
When to use GraphQL Explorer
- API development: Design and validate GraphQL Schemas
- Frontend integration: Build and format query statements
- Code review: Formatted code makes Schema issues easier to spot
- Learning: Understand the GraphQL type system
π FAQ
What is GraphQL?
GraphQL is an API query language developed by Facebook that allows clients to precisely specify the data they need, avoiding over-fetching or under-fetching. Unlike REST, GraphQL uses a single endpoint and defines data structure through a type system, supporting nested queries and real-time subscriptions.
What is the difference between GraphQL and REST?
Key differences: 1) GraphQL single endpoint vs REST multiple endpoints; 2) GraphQL client specifies data vs REST server-fixed responses; 3) GraphQL strong type system vs REST no type constraints; 4) GraphQL avoids over-fetching vs REST often returns excess data; 5) GraphQL supports nested queries vs REST requires multiple requests.
What is a GraphQL Schema?
A Schema is GraphQL's type system definition, describing all data types, queries, and mutation operations supported by the API. It's written in Schema Definition Language (SDL) and contains three root types: Query (read), Mutation (write), and Subscription (real-time).
How to format GraphQL queries?
This tool automatically formats GraphQL queries to standards: consistent 2-space indentation, one field per line, standardized brace placement, and organized arguments and directives.
Is my data uploaded to a server?
No. All GraphQL parsing and formatting happens locally in your browser. Your Schema and queries are never sent to any server.