GraphQL Query Builder
Build and test GraphQL queries with schema introspection and AI suggestions.
A lightweight, browser-based GraphQL client and playground for exploring schemas, composing queries, and executing GraphQL requests in real time. Introspect any GraphQL endpoint to browse types, queries, and mutations with full type documentation. Features an intuitive query and variable editor with syntax validation, custom authorization header configuration, and formatted response visualization with error highlights. Generate cURL commands for terminal execution and inspect saved query history. Runs client-side with an optional proxy to bypass CORS.
Keywords: graphql playground, graphql tester, graphql query builder, graphql client online, graphiql alternative, graphql explorer, graphql schema browser, graphql api tester, graphql introspection, free graphql playground, graphql query editor, apollo studio alternative
Tags: graphql, api, query, schema, playground, introspection
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How to GraphQL Query Builder Online
Enter your GraphQL API endpoint URL in the URL bar at the top.
Write your GraphQL query in the query editor, or click 'Introspect Schema' to explore available types and fields.
Add query variables as JSON in the Variables tab if your query uses parameterized inputs.
Add custom headers (e.g., Authorization) in the Headers tab for authenticated APIs.
Click Execute or press Cmd+Enter to run the query and view the formatted response.
GraphQL Query Builder Features
Full GraphQL query editor with syntax validation and prettify support.
Schema introspection to browse all types, fields, and arguments from any GraphQL endpoint.
Variables editor for parameterized queries with JSON validation.
Custom headers support for authenticated GraphQL APIs (Bearer token, API key, etc.).
Response visualization with syntax-highlighted JSON, GraphQL error highlighting, and timing.
Multiple operation support with operation name selector dropdown.
Query history storing your last 30 queries for one-click replay.
Copy query as cURL command for sharing or use in scripts.
Server-side proxy for CORS bypass — query any GraphQL API without browser restrictions.
AI-powered query suggestions, error explanations, and optimization tips.
Keyboard shortcuts for fast workflow: Cmd+Enter to execute, Cmd+Shift+P to prettify.
Pre-loaded example endpoints (Countries API, SpaceX API, Rick & Morty API) to try immediately.
In-Depth Technical Guides
All GuidesRelated Standards & RFC Specifications
All StandardsExplore Full AI Model Pricing Directory
Compare per-token rates, prompt caching discounts, and context windows across leading LLMs (GPT-4o, Claude 3.5 Sonnet, Gemini 2.5 Flash, DeepSeek, and more) in our verified catalog.
Pre-built Automation Pipelines
Chain GraphQL Query Builder with other utilities in a multi-step visual workflow.
Base64 Decode → JSON Format
Decode a Base64 string and pretty-print the JSON inside it.
CSV → JSON → YAML
Convert CSV data to JSON, then to YAML format.
JSON Format → TypeScript Schema
Format JSON and generate TypeScript/Zod schema from it.
Example Input & Output
Sample ReferenceInteractive Example: GraphQL Query Builder in ActionShow example
Sample Input (text)
{"endpoint":"https://countries.trevorblades.com/graphql","query":"query {\n continents {\n name\n code\n countries {\n name\n capital\n }\n }\n}"}Sample Output
[Processed output for GraphQL Query Builder]
Input transformed successfully using graphql playground, graphql tester, graphql query builder.What happened:
Build and test GraphQL queries with schema introspection and AI suggestions.
Pairwise Format Converters
All ConvertersConvert YAML to GraphQL Schema Definition
Free, 100% client-side private YAML to GraphQL Schema Definition converter. Transform syntax instantly in your browser with zero data logging, strict AST validation, and CLI support.
Convert TOML to GraphQL Schema Definition
Free, 100% client-side private TOML to GraphQL Schema Definition converter. Transform syntax instantly in your browser with zero data logging, strict AST validation, and CLI support.
Convert CSV to GraphQL Schema Definition
Free, 100% client-side private CSV to GraphQL Schema Definition converter. Transform syntax instantly in your browser with zero data logging, strict AST validation, and CLI support.
Convert XML to GraphQL Schema Definition
Free, 100% client-side private XML to GraphQL Schema Definition converter. Transform syntax instantly in your browser with zero data logging, strict AST validation, and CLI support.
Convert SQL (DDL / Inserts) to GraphQL Schema Definition
Free, 100% client-side private SQL (DDL / Inserts) to GraphQL Schema Definition converter. Transform syntax instantly in your browser with zero data logging, strict AST validation, and CLI support.
Convert TypeScript Interfaces to GraphQL Schema Definition
Free, 100% client-side private TypeScript Interfaces to GraphQL Schema Definition converter. Transform syntax instantly in your browser with zero data logging, strict AST validation, and CLI support.
Frequently Asked Questions
- Is this a replacement for GraphiQL or Apollo Studio?
- It is a lightweight alternative for quick GraphQL query testing directly in your browser. For complex workflows, schema management, and team collaboration, dedicated GraphQL IDEs like GraphiQL or Apollo Studio are still recommended. DevFlow GraphQL Query Builder is ideal for fast, ad-hoc queries during development.
- Does it support mutations and subscriptions?
- Yes, queries and mutations are fully supported. Subscriptions (WebSocket-based) are not supported in the initial version since they require persistent connections.
- Why does it use a server proxy?
- Browsers enforce CORS security policy which blocks most cross-origin requests. Without a proxy, queries to external GraphQL APIs would fail with CORS errors. Our server-side proxy forwards your request and never stores any data.
- Can I explore the schema without writing queries?
- Yes. Click 'Introspect Schema' to fetch the full schema from your endpoint. You can then browse all types, fields, arguments, and descriptions in the Schema Explorer tab.
- How does query history work?
- The last 30 queries you execute are saved to your browser's localStorage. Click the History button to view and replay any previous query. History is stored locally and never sent to any server.
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