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GraphQL Formatter

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Beautify and minify GraphQL queries, mutations, and schemas.

GraphQL Formatter
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This tool runs entirely in your browser. Your input is never uploaded, logged, or sent to AllDevToolsHub or anyone else, and it keeps working offline once the page has loaded.

How to Use GraphQL Formatter

01

Paste GraphQL

Enter a GraphQL query, mutation, or schema definition.

02

Format

Click Format to prettify the GraphQL with proper indentation.

03

Copy

Copy the formatted output.

GraphQL Formatter: the essentials

The GraphQL Formatter reflows queries, mutations, subscriptions, and SDL schemas into consistent indentation, or minifies them for embedding in code. Handles whitespace-collapsed copy/pastes from logs, network tabs, or chat messages where the original formatting was lost.

Key points

  • Reflows graphql formatter into clean, readable output with standard indentation and keyword casing.
  • Runs entirely in your browser, so production data never leaves your device.
  • Supports multiple dialects and syntax variants for broad compatibility.
Overview

What is GraphQL Formatter?

Format messy GraphQL into clean, indented code or minify it for production. Handles queries, mutations, subscriptions, and types with handy example presets.
FAQ

Frequently Asked Questions

Reference

Technical Deep Dive

FORMATTERS

GraphQL Formatter

Format messy GraphQL into clean, indented code or minify for production. Handles queries, mutations, subscriptions, and type definitions. Includes example presets for common GraphQL patterns.

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Reliable Formatting

Idempotent, spec-compliant output, run it twice, get the same result.

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Configurable Style

Indentation, quote style, and edge-case handling tunable to your team's conventions.

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Big Inputs, Fast

Handles megabytes of code without freezing the tab, heavy lifting runs in workers.

01 Node Specification Matrix

Node Type Standard Indent Parent Bracing Comment Preservation
Operation2 SpacesSame Line {Above Block
FieldDepth N + 1FlatTrailing / Above
ArgumentDepth N + 1Multi-line if 3+Inline
DirectiveFlatInlineInline

02 Document Serialization Workflow

1
Lexical Analysis The raw string is tokenized into a stream of Identifiers, Punctuators, and String Literals following the GraphQL spec.
2
AST Reconstruction The token stream is parsed into a structured Abstract Syntax Tree, mapping nested selection sets and fragments.
3
Pretty Printing The printer recursively visits the AST nodes, emitting a canonical document with consistent indentation and line breaks.

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