GraphQL To Introspection JSON
Convert GraphQL schema SDL to introspection JSON for tooling, codegen, and schema validation.
Convert GraphQL Schema SDL to Introspection JSON
GraphQL introspection describes every type, field, argument, and enum in a schema as structured JSON. Many tools expect this format: schema registries, GraphQL playgrounds, contract tests, and code generators that cannot reach a live endpoint.
What this tool does
Paste GraphQL schema definition language (SDL). The converter produces a pretty-printed
introspection JSON document matching the standard __schema introspection
response shape. Edit the schema and the JSON refreshes automatically.
Related tools
Building an Apollo Client cache? Generate a focused fragment matcher with the GraphQL to Fragment Matcher tool. For typed client code, use the GraphQL to Components Generator or GraphQL to Flow Converter. To format SDL before conversion, try the GraphQL Beautifier.
Frequently Asked Questions
What is GraphQL introspection JSON used for?
Introspection JSON powers schema documentation, IDE autocomplete, codegen pipelines, and tooling that needs the full type graph without querying a live GraphQL server.
Can I convert schema files without a running API?
Yes. This tool works from SDL text alone. You do not need network access to a GraphQL endpoint or an introspection query over HTTP.
Does the output match server introspection responses?
The JSON follows the standard introspection structure produced by GraphQL Code Generator introspection plugin, compatible with most schema tooling that accepts introspection result files.
Are custom scalars included in the output?
Yes. Scalar, object, input, enum, interface, and union types declared in your SDL appear in the generated introspection document with their fields and arguments.
Is my schema uploaded anywhere?
No. Conversion runs locally in your browser. Schema text is not transmitted to any server.
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