Does it work for SDL schema definitions?

Yes. In addition to queries and mutations, the formatter handles SDL type definitions, input types, enums, interfaces, unions, and directives.

Does it validate GraphQL syntax?

Yes. The parser validates the input and reports any syntax errors with line and column numbers before formatting.

Can I format introspection query output?

Yes. Paste the raw introspection SDL output and the formatter produces a clean, readable schema definition.

Best Free GraphQL Formatter Online

GraphQL queries and schema definitions can become difficult to read in code reviews, logs, and documentation when they are minified or inconsistently indented. devtoolkit.sh's GraphQL Formatter applies consistent formatting to any GraphQL document — queries, mutations, subscriptions, fragments, and SDL type definitions — according to the GraphQL specification. It also validates the syntax and reports errors with exact line numbers. Paste your GraphQL and get clean, readable output that you can copy back into your codebase or share with your team. All processing runs locally in your browser.

graphql input

lines

0 chars1 lines

formattedREADY

lines

0 chars1 lines

FAQ

Does it work for SDL schema definitions?: Yes. In addition to queries and mutations, the formatter handles SDL type definitions, input types, enums, interfaces, unions, and directives.
Does it validate GraphQL syntax?: Yes. The parser validates the input and reports any syntax errors with line and column numbers before formatting.
Can I format introspection query output?: Yes. Paste the raw introspection SDL output and the formatter produces a clean, readable schema definition.