GraphQL Schema to TypeORM Entity Generator

Convert GraphQL SDL types, fields, enums, and relations into production-ready TypeScript TypeORM entity classes.

At a glance

GraphQL Schema to TypeORM Entity Generator is a free developer utility that transforms GraphQL Schema Definition Language (SDL) types, fields, enums, and relations into TypeScript TypeORM entity classes. It enforces inverted nullability, maps decorators and primary keys, and synthesizes object relations 100% client-side in your browser memory.

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100% Client-Side GraphQL SDL to TypeORM Entity Generator

Zero Server Uploads

Transform GraphQL SDL types, fields, enums, and relations into clean TypeScript TypeORM entity classes with inverted nullability.

Local Browser Sandbox
Presets:
0 chars
0 entities
Entities 0
Enums 0
Columns 0
Relations 0

Why Use This GraphQL Schema to TypeORM Entity Generator?

100% Client-Side Privacy: Your GraphQL schemas never leave your device or touch any server.
Inverted Nullability Engine: Accurately converts GraphQL non-null (!) to required TypeORM columns and nullable fields to optional (?) with nullable: true.
Relationship Synthesis: Maps 1-to-Many and 1-to-1 relations to @OneToMany, @ManyToOne, and @OneToOne with foreign keys and @JoinColumn.
Configurable Primary Keys: Supports both UUID (@PrimaryGeneratedColumn('uuid')) and auto-increment integer strategies.

How to Use GraphQL Schema to TypeORM Entity Generator

1

Input GraphQL SDL

Paste your GraphQL schema definition into the editor or upload a .graphql file.

2

Configure Strategy

Choose your primary key strategy (UUID or increment) and toggle table pluralization and auto-timestamps.

3

Copy or Download

Copy the generated TypeScript TypeORM entities or download them as entities.ts.

GraphQL Schema to TypeORM Entity example

Converts a GraphQL User type into a decorated TypeORM class with UUID primary key, required name, and nullable bio.

GraphQL SDL Input Source 
type User {
  id: ID!
  name: String!
  bio: String
}
Generated TypeORM Entity Processed 
@Entity('users')
export class User {
  @PrimaryGeneratedColumn('uuid')
  id: string;

  @Column({ type: 'varchar', length: 255 })
  name: string;

  @Column({ type: 'text', nullable: true })
  bio?: string;
}

Technical Specifications & Engine Details

Technical specifications and engine details for GraphQL Schema to TypeORM Entity Generator
Specification Details
Supported Input GraphQL SDL (type, enum, scalar, docstrings)
Generated Output TypeScript TypeORM Classes (@Entity, @Column, @PrimaryGeneratedColumn, relations)
Nullability Mapping Inverted (GraphQL ! required → TypeScript property, unadorned → ? nullable: true)
Execution Mode 100% Client-Side In-Browser (Zero server latency)
Maintained by Pragyan Pahadi

100% Client-Side Privacy Guarantee

Your files remain strictly on your local device. Zero data is transmitted to external servers.

Frequently Asked Questions

How does this tool handle GraphQL nullability in TypeORM?
In GraphQL SDL, fields are nullable by default unless marked with an exclamation mark (!). In TypeORM, entity properties without nullable: true are non-null. The generator inverts this automatically: required GraphQL fields become standard properties, while nullable fields receive TypeScript ? and @Column({ nullable: true }).
How are GraphQL relations mapped to TypeORM decorators?
Object reference fields (e.g. author: User!) map to @ManyToOne with @JoinColumn and an underlying foreign key column (authorId). List fields (e.g. posts: [Post!]!) map to @OneToMany(() => Post, post => post.author).
Does this generator upload schemas to a backend server?
No. All AST parsing and TypeScript code synthesis execute 100% client-side inside your browser JavaScript engine. No schema code is ever sent over the network.
Can I choose between UUID and auto-incrementing IDs?
Yes. Use the Primary Key Strategy dropdown to generate either @PrimaryGeneratedColumn('uuid') with string IDs or @PrimaryGeneratedColumn() with numeric IDs.

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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