GraphQL Formatter and Validator
Format and validate GraphQL documents. Pretty-print SDL and operations, check syntax.
GraphQL Formatter and Validator
Paste a GraphQL document (schema or operation), then click Format to pretty-print it or Validate to check syntax. Errors show line and column when available. For JSON APIs, use the JSON Formatter or JSON Schema Validator.
Use cases
- Schema cleanup – Format SDL before commit
- Query validation – Check query/mutation syntax
- Consistent formatting – Standardize indentation
Added Mar 6, 2026
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