ValidateThis

GraphQL query syntax lint

Related tools

Validators and utilities that complement GraphQL query syntax lint — same session, no sign-up.

Parse GraphQL documents with the graphql package — lexical and grammar errors only. Does not validate selections against a schema or run queries.

Uses the reference graphql parser — catches invalid tokens, brackets, and operation/type syntax. Does not validate schema fields against a live server.

How to use this tool

  1. Paste your sample in the input (or fetch from URL if this tool supports it).
  2. Run the main action on the page to execute GraphQL query syntax lint.
  3. Read the result, fix the source data or config, and re-run if needed.

What this check helps you catch

  • Parse GraphQL documents with the graphql package — lexical and grammar errors only. Does not validate selections against a schema or run queries.
  • Limits called out in the description (what this tool does not verify — e.g. live network reachability, issuer databases, or strict schema contracts unless stated).
  • Structural or syntax mistakes that would break parsers, serializers, or the next step in your workflow.

FAQ

What does GraphQL query syntax lint do?
Parse GraphQL documents with the graphql package — lexical and grammar errors only. Does not validate selections against a schema or run queries. Use the form above, then see “How to use” and “What this check helps you catch” for behavior detail.
Is this a substitute for server-side validation?
No. Use it for manual checks and triage; production systems should still validate and authorize on the server.
Where does processing happen?
Most validators here run in your browser. If a tool calls an API, that is stated on the page. See the site privacy policy for data handling.