GraphQL Formatter
Format and beautify your GraphQL queries with clean indentation. Supports query, mutation, subscription and JSON variables formatting.
Everything you need to know about GraphQL formatting
Why use a GraphQL formatter?
GraphQL queries quickly become unreadable when written on a single line or copied from logs and monitoring tools. A formatter automatically restructures indentation, braces, and arguments for immediate readability.
Well-formatted GraphQL code makes code reviews easier, helps catch syntax errors, and improves team collaboration. Consistent indentation highlights the hierarchical structure of field selections and fragments.
This tool runs entirely in your browser without sending your queries to any server. Your data stays private, which is essential when working with queries that contain sensitive information.
Who uses this tool?
- Front-end developers
- Quickly format GraphQL queries copied from browser DevTools or API responses. Clean up queries before integrating them into source code.
- Back-end developers
- Format schemas, mutations, and GraphQL subscriptions when designing APIs. Visually verify the structure of resolvers and types.
- QA teams
- Format queries extracted from test logs for easier debugging. Visually compare queries before and after modifications.
- Trainers and educators
- Present well-indented GraphQL queries in course materials and tutorials. Clearly demonstrate GraphQL syntax to learners.
How does this tool work?
Paste your GraphQL query into the input field. The tool accepts queries, mutations, subscriptions, and schema definitions, even if compacted on a single line.
Click "Format." The tool parses the query structure and applies 2-space indentation per nesting level. Arguments, directives, and fragments are properly aligned.
Copy the formatted result with one click. You can also format associated JSON variables by entering them in the optional dedicated field.
Frequently asked questions
- What types of GraphQL queries are supported?
- The tool supports queries, mutations, subscriptions, type definitions (type, input, enum, interface, union, scalar), fragments, and directives. Nested arguments and variables are also properly formatted.
- Does formatting change the behavior of my query?
- No. Formatting only modifies indentation and whitespace. The query semantics remain strictly identical. String literals and comments are preserved as-is.
- Can I format JSON variables along with the query?
- Yes. An optional field lets you enter the JSON variables associated with your query. They will be formatted with 2-space indentation. If the JSON is invalid, an error message is displayed.
- Is my data sent to a server?
- No. Formatting is performed entirely in your browser via JavaScript. No network requests are made. Your GraphQL data stays on your machine.
- Can the tool detect GraphQL syntax errors?
- The tool formats the query to the best of its ability, but it is not a full GraphQL syntax validator. Major syntax errors (such as unclosed braces) may produce unexpected output.
GraphQL Formatter: additional questions
Is there a free online GraphQL formatter?
Yes. This GraphQL formatting tool is 100% free, with no sign-up and no usage limits. It runs directly in your browser without sending any data to a server.
Can this GraphQL formatter be used for professional projects?
Absolutely. The tool is suited for professional use: no data is transmitted, processing is local, and the output follows standard GraphQL community formatting conventions.
Does this formatter work with GraphQL Federation schemas?
Yes. The tool correctly formats Federation-specific directives like @key, @external, and @requires, as well as type extensions with extend. The hierarchical structure is preserved.