DevToolKit

GraphQL Formatter

Format, beautify, and validate GraphQL queries, mutations, and schemas (SDL) instantly. 100% private, client-side formatting with syntax error detection.

Input Query / SDL

Formatted Output

Waiting for input...

Query Beautifier

Transform messy, single-line queries into readable, well-indented code blocks. Essential for debugging and documentation.

SDL Support

Fully supports Schema Definition Language. Format your types, inputs, and directives with standard GraphQL specifications.

Instant Validation

Detects syntax errors in real-time as you type, providing exact line and column markers for quick fixes.
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How to Use

The Professional GraphQL Formatter is a specialized developer utility designed to clean up messy queries and validate your Schema Definition Language (SDL).

How to use this tool

  1. Paste Input: Enter your GraphQL query, mutation, or schema into the left editor pane.
  2. Auto-Format: The tool automatically beautifies your code in real-time as you type.
  3. Select Mode: Toggle between Beautify (expanded, readable format) and Minify (compact, one-line format).
  4. Fix Errors: If there's a syntax error, a detailed alert will appear at the bottom indicating the exact location of the issue.
  5. Copy: Click the copy icon to grab the formatted result for use in your project or documentation.

About This Tool

Spec-Compliant Formatting

Unlike generic code formatters, this tool uses the official graphql specification to parse your input into an Abstract Syntax Tree (AST). This ensures that every field, argument, and directive is placed exactly where it should be according to the latest GraphQL standards.

Whether you are cleaning up a deeply nested fragment or formatting a complex backend type system, our formatter handles the heavy lifting with surgical precision.

Why Use This Tool

100% Local & Private

Your GraphQL schemas often contain sensitive business logic and data structures. That's why we perform all formatting and validation **locally in your browser**. No code is ever uploaded to a server, and no analytics track your query contents. It's fast, secure, and ready for enterprise-level development.

FAQ

What types of GraphQL documents can it format?
It formats queries, mutations, subscriptions, fragments, and complete schema definitions (SDL) including types, interfaces, enums, unions, and inputs.
Does it detect syntax errors?
Yes. The parser identifies syntax errors in GraphQL documents and reports them with the exact location to help you fix them quickly.
Is it safe to format queries containing sensitive data?
Yes. All formatting happens in your browser. Your queries with authentication variables or private data are never sent to any server.
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