SQL DDL to GraphQL Schema Generator

Convert SQL CREATE TABLE statements into clean GraphQL SDL schemas with inverted nullability, relations, and input types.

At a glance

SQL DDL to GraphQL Schema Generator is a free developer utility that transforms SQL CREATE TABLE DDL queries into GraphQL Schema Definition Language (SDL). It maps column data types to GraphQL scalars, handles inverted nullability, infers foreign key relations, and generates types, input objects, queries, and mutations 100% client-side in browser memory.

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100% Client-Side SQL DDL to GraphQL Schema Generator

Zero Server Uploads

Transform SQL CREATE TABLE statements into GraphQL Schema Definition Language (SDL) with inverted nullability, foreign key relations, input types, and root queries.

Local Browser Sandbox
Presets:
Input
0 chars
Output
0 types
Inverted nullability mapping: SQL NOT NULL → GraphQL !.
SQL to Drizzle

Convert SQL CREATE TABLE DDL queries into TypeScript Drizzle ORM schema table definitions.
SQL to Kysely

Transform SQL DDL tables into type-safe Kysely database and table TypeScript interfaces.
GraphQL to Zod

Convert GraphQL SDL schemas into runtime Zod validation models with inverted nullability.

Why Use This SQL DDL to GraphQL Schema Generator?

Converts SQL CREATE TABLE statements into clean GraphQL SDL schemas
Accurately maps SQL NOT NULL to GraphQL non-null (!) and nullable to unadorned fields
Synthesizes foreign key relations into nested GraphQL object types
Generates Create and Update input types plus root Query and Mutation definitions
100% client-side privacy: SQL schema data never leaves your browser

How to Use SQL DDL to GraphQL Schema Generator

1

Paste SQL DDL

Paste your SQL CREATE TABLE statements into the editor or load a preset.

2

Configure Output

Choose ID type mapping, and toggle Root Queries, Mutations, or Input types.

3

Copy or Download

Copy the generated GraphQL SDL schema or download as schema.graphql.

SQL CREATE TABLE to GraphQL SDL Conversion

The generator maps the SQL columns to GraphQL fields with proper nullability (! on required fields, unadorned on nullable bio), creates CreateUserInput, and generates root Query and Mutation types.

SQL DDL (CREATE TABLE) Source 
CREATE TABLE users (
  id INT PRIMARY KEY AUTO_INCREMENT,
  name VARCHAR(100) NOT NULL,
  email VARCHAR(255) NOT NULL,
  bio TEXT
);
GraphQL SDL (Schema) Processed 
type User {
  id: ID!
  name: String!
  email: String!
  bio: String
}

input CreateUserInput {
  name: String!
  email: String!
  bio: String
}

type Query {
  users: [User!]!
  user(id: ID!): User
}

type Mutation {
  createUser(input: CreateUserInput!): User!
  updateUser(id: ID!, input: UpdateUserInput!): User!
  deleteUser(id: ID!): Boolean!
}

Technical Specifications & Engine Details

Technical specifications and engine details for SQL DDL to GraphQL Schema Generator
Specification Details
Supported Formats SQL, TEXT → GRAPHQL, TEXT
Execution Mode 100% Client-Side In-Browser (client)
Browser Requirements Modern browser with ES2020 JavaScript support.
Performance Constraints Pure client-side conversion. Custom vendor-specific triggers and index options are safely omitted from SDL schema representations.
Maintained by Pragyan Pahadi

100% Client-Side Privacy Guarantee

Your database schema remains strictly on your local device. Zero data is transmitted to external servers.

Frequently Asked Questions

How are primary keys and autoincrement IDs represented in GraphQL?
Columns designated as PRIMARY KEY map to ID! by default (configurable to Int! or String!). In CreateInput types, auto-incrementing primary keys are automatically omitted.
How does the generator handle foreign key relationships?
When a column has an inline or table-level REFERENCES constraint, the generator creates both the scalar foreign key field (e.g. author_id: Int!) and the synthesized nested relationship field (e.g. author: User!).
Is my SQL database schema private?
Yes, 100%. The conversion runs completely within your browser's local JavaScript engine. No schema code is ever sent to any remote server.

Methodology

This tool runs entirely in your browser. The example above shows a representative input and the result it produces.

Last updated .

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