GraphQL Formatter / Validator
Paste GraphQL query, mutation, fragment, or schema SDL to format, validate, minify, and inspect structure.
What is a GraphQL Formatter / Validator?
A GraphQL Formatter / Validator formats GraphQL queries, mutations, subscriptions, fragments, and schema SDL into a consistent readable style.
It helps developers review GraphQL documents, catch syntax errors early, minify requests, and check basic structure such as operations, fragments, schema types, and selection depth.
How to use the GraphQL Formatter / Validator
- Paste a GraphQL query, mutation, fragment, or schema definition into the input editor.
- Click Format to pretty-print the document with consistent indentation.
- Click Validate to check syntax without changing the output.
- Review operations, fragments, types, depth, and validation notes.
Tips
- Use Format before code review to make GraphQL queries easier to scan.
- Use Minify when embedding a query in a compact request payload.
- High selection depth can make GraphQL resolvers more expensive.
- This tool validates syntax locally in your browser; it does not validate fields against a remote schema.
Related guides
Learn the workflow behind this tool and what to check next.
GraphQL checks before sharing or executing an operation
Formatting makes an operation readable, but correctness still depends on the schema, variables, fragments, and server authorization rules.
Operation identity
Name queries and mutations clearly so traces, persisted operations, logs, and error reports identify the same request.
Variables
Move changing values into typed variables and verify required markers, list types, nullability, and default values.
Fragments and fields
Remove unused fragments and duplicate selections while keeping required identifiers and pagination fields in the response.
Secret removal
Do not include bearer tokens, cookies, customer data, or production variable values when sharing an operation for debugging.
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