Dev
GraphQL Schema Generator
Writing GraphQL type definitions by hand means remembering SDL syntax, capitalising type names, appending exclamation marks for non-null fields, and getting the indentation right — every time you add a new object type. This generator takes a name and field list and returns a properly formatted type block, ready to drop into your schema file. Enter the type name — the first letter is capitalised to follow GraphQL convention — then list fields as name:Type pairs separated by commas. Use any valid GraphQL type: scalars like ID!, String!, or Int; custom object types; or lists like [Post!]!. The exclamation mark is preserved verbatim. Field names are cleaned to valid identifiers, and any field without a colon defaults to String. Paste the output into your schema file and wire up resolvers. The generator handles formatting so you can focus on modelling the data.
How to use
- Choose your options above
- Click Generate
- Copy your result
Detailed instructions
- Enter the GraphQL type name.
- List fields as name:Type pairs, separated by commas.
- Click Generate to produce the type definition.
- Paste it into your schema and wire up resolvers.
Use Cases
- •Scaffolding an object type for a GraphQL API
- •Sketching a schema quickly during API design
- •Converting a field list into valid GraphQL SDL
- •Teaching how GraphQL type definitions are structured
- •Saving boilerplate when defining several related types
Tips
- →Append an exclamation mark, like String!, to mark a field non-null.
- →Use list syntax such as [Comment!]! for array fields.
- →Capitalise type names to follow GraphQL convention.
- →Remember you still need resolvers to back the type.
FAQ
which graphql types can I use in the field list
Any valid GraphQL type — scalars like String, Int, Float, Boolean, and ID, your own object types, and list types like [Comment!]!. Append an exclamation mark to mark a field non-null. The generator places the type verbatim, so standard SDL syntax applies.
does it generate resolvers or queries
No. It produces only the type definition block. You still need to write resolvers for each field and add the type to a Query or Mutation root type yourself.
what defaults apply when I omit a type
A field without a colon defaults to the String scalar. Field names are stripped of characters invalid in GraphQL identifiers. Review the output to confirm nullability and types are correct before using it.
can I use this output with any GraphQL server library
Yes. The output is standard GraphQL SDL, accepted by Apollo Server, graphql-js, Nexus SDL mode, and most other server libraries that read schema strings or .graphql files.
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