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Format and beautify GraphQL schemas, queries, and mutations with consistent indentation, proper field alignment, syntax validation, and error detection following GraphQL specification standards.
Note: AI can make mistakes, so please double-check it.
// Formatted output will appear here
Common questions about this tool
Paste your GraphQL schema definition (SDL) or query into the formatter, and it automatically applies consistent indentation, proper field alignment, and formats types, fields, arguments, and directives according to GraphQL specification standards.
Yes, the formatter validates GraphQL syntax and detects errors like invalid field names, type mismatches, missing required arguments, circular references, and syntax issues. It provides detailed error messages with line numbers.
The formatter supports schemas, queries, mutations, subscriptions, types, interfaces, unions, enums, scalars, directives, fragments, and inline fragments. It handles all GraphQL specification features correctly.
Yes, the formatter handles introspection queries and formats them properly. It maintains readability for complex queries with nested fields, fragments, and variables while ensuring valid GraphQL syntax.
No, formatting only changes whitespace and indentation. GraphQL queries execute identically regardless of formatting. Proper formatting improves readability and makes queries easier to debug and maintain.
Verified content & sources
This tool's content and its supporting explanations have been created and reviewed by subject-matter experts. Calculations and logic are based on established research sources.
Scope: interactive tool, explanatory content, and related articles.
ToolGrid — Product & Engineering
Leads product strategy, technical architecture, and implementation of the core platform that powers ToolGrid calculators.
ToolGrid — Research & Content
Conducts research, designs calculation methodologies, and produces explanatory content to ensure accurate, practical, and trustworthy tool outputs.
Based on 1 research source:
Learn what this tool does, when to use it, and how it fits into your workflow.
GraphQL Formatter helps you format and validate GraphQL schemas, queries, and mutations. It applies consistent indentation, proper field alignment, and syntax validation. The tool ensures your GraphQL code follows specification standards.
GraphQL code must be readable and valid. Poor formatting makes queries hard to understand. Invalid syntax causes API errors. Inconsistent style makes code reviews difficult. Consistent formatting solves these problems.
This tool formats GraphQL code automatically. It fixes indentation issues. It aligns fields properly. It validates syntax. It makes code look professional and consistent.
This tool is for API developers, frontend developers, and GraphQL teams. Beginners can use it to learn proper formatting. Experienced developers can use it to maintain style consistency. Teams can use it to enforce coding standards.
GraphQL is a query language for APIs. It lets clients request exactly the data they need. It provides a single endpoint for all operations. It makes API development more flexible.
GraphQL uses schemas to define data structures. Schemas describe types, fields, and relationships. Queries request specific data. Mutations modify data. Subscriptions listen for changes.
GraphQL syntax must be correct. Invalid queries return errors. They do not execute. Syntax errors prevent API calls from working.
GraphQL code must be readable. Teams review API changes carefully. Readable code helps find problems. It makes reviews faster. It reduces errors. A related operation involves mocking GraphQL responses as part of a similar workflow.
But formatting GraphQL code manually is tedious. Developers forget spacing rules. They mix indentation styles. They create inconsistent code. This makes reviews harder.
GraphQL has strict syntax rules. Field names must be valid. Types must match schemas. Arguments must be correct. Missing these elements causes errors.
Writing GraphQL by hand takes time. You must check every field. You must verify every type. You must test every query. This is tedious and error-prone.
This tool solves these problems. It formats code automatically. It validates syntax. It shows errors clearly. It helps you write correct GraphQL code.
Frontend developers use this tool to format GraphQL queries. They write queries quickly without worrying about formatting. The tool makes them look professional automatically.
API developers use it to format schema definitions. They create schemas with consistent style. This makes schemas easier to read and maintain.
Code reviewers use it to prepare queries for review. They format code before reviewing. This makes reviews faster and more consistent. For adjacent tasks, formatting JSON data addresses a complementary step.
Teams use it to enforce coding standards. Everyone formats code the same way. This creates uniform codebases across projects.
Students use it to learn GraphQL formatting. They see how queries should look. They understand syntax rules better.
Developers use it to validate queries before sending. They check syntax before making API calls. This prevents errors and saves time.
Documentation writers use it to format example queries. They create professional-looking examples. This improves documentation quality.
Open source contributors use it to format pull requests. They ensure code matches project style. This makes contributions more professional.
The formatter uses Prettier with GraphQL plugin. Prettier is an industry-standard code formatter. It follows GraphQL specification rules exactly.
Formatting configuration sets print width to 80 characters. This limits line length for readability. Longer lines are wrapped automatically. When working with related formats, beautifying source code can be a useful part of the process.
Indentation uses 2 spaces per level. This matches common GraphQL style guides. Each nested level adds 2 more spaces.
Trailing comma support follows ES5 standards. Commas are added where appropriate. This creates consistent formatting.
Validation works by attempting to format code. If formatting succeeds, code is valid. If formatting fails, errors are extracted from the exception.
Error extraction reads line and column numbers from exceptions. It extracts error messages. It creates validation error objects with this information.
Input validation checks file size first. Files over 500KB are rejected. Line count over 10,000 is rejected. Lines over 1,000 characters trigger warnings.
Debouncing delays validation until typing stops. It waits 400 milliseconds after the last keystroke. This prevents excessive processing during fast typing.
AI fix suggestions truncate code to 50KB for processing. Very large queries are shortened. This keeps AI responses fast and accurate. In some workflows, formatting HTML markup is a relevant follow-up operation.
Prettier loading happens lazily. The formatter loads only when needed. This improves initial page load time. It falls back to CDN if local import fails.
| Input Limit | Value | Reason |
|---|---|---|
| Maximum File Size | 500KB | Prevents browser performance issues |
| Maximum Lines | 10,000 lines | Keeps processing time reasonable |
| Maximum Line Length | 1,000 characters | Prevents formatting issues with complex queries |
| Indentation Size | 2 spaces | Matches common GraphQL style guides |
| Print Width | 80 characters | Improves readability and prevents long lines |
| Debounce Delay | 400ms | Balances responsiveness with performance |
| AI Processing Limit | 50KB | Keeps AI responses fast and accurate |
| Mode | Description | When to Use |
|---|---|---|
| Format | Formats valid GraphQL code with consistent styling | When you want to format valid code |
| Validate | Checks syntax without formatting | When you want to check syntax only |
| GraphQL Element | Description | Example |
|---|---|---|
| Query | Reads data from the API | query { user { name } } |
| Mutation | Modifies data in the API | mutation { createUser(name: "John") } |
| Subscription | Listens for real-time updates | subscription { messageAdded } |
| Schema | Defines data structure | type User { name: String } |
| Fragment | Reusable field selection | fragment UserFields on User { name } |
| Directive | Modifies query execution | @skip(if: $skip) |
Format queries regularly during development. Do not wait until the end. Regular formatting makes code easier to read and review.
Review error messages carefully. They help identify syntax problems. Fix errors before using queries. Syntax errors prevent API calls from working.
Use AI suggestions as learning tools. They explain what went wrong. But do not rely on them completely. Always verify fixes yourself.
Keep queries under 500KB for best performance. Very large queries may be slow to format. Consider splitting large queries into smaller ones.
Understand that formatting does not change query logic. It only changes whitespace and indentation. Query results stay the same.
Use consistent formatting across your project. Format all queries the same way. This creates professional, uniform codebases. For related processing needs, formatting CSS handles a complementary task.
Learn GraphQL syntax rules. Understanding syntax helps you write better queries. The tool helps, but knowledge is valuable.
Test formatted queries before using them. Formatting should not change functionality. But always verify that queries still work correctly.
Use the sample queries to learn formatting. Modify them to see how formatting changes. This helps you understand the tool better.
Copy formatted code instead of retyping. This prevents mistakes. It saves time when working with multiple queries.
Remember that formatting improves readability. But it does not fix logic errors. Always test your queries thoroughly before using them.
Validate queries before sending to API. Use the validate mode to check syntax. This prevents errors and saves time.
Review AI suggestions carefully. Not all suggestions may be appropriate. Use your judgment based on your specific needs.
Keep queries readable. Use meaningful field names. Add comments where helpful. Formatting helps, but good structure matters more.
We’ll add articles and guides here soon. Check back for tips and best practices.
Summary: Format and beautify GraphQL schemas, queries, and mutations with consistent indentation, proper field alignment, syntax validation, and error detection following GraphQL specification standards.