JSON Schema to TypeORM Entity Converter
Instant in-browser JSON Schema to TypeORM TypeScript entity generator with decorators, inverted nullability, and relations.
At a glance
JSON Schema to TypeORM Entity Converter generates TypeScript entities with @Entity, @PrimaryGeneratedColumn, @Column, and @CreateDateColumn decorators from JSON Schema with inverted nullability entirely in browser memory.
100% Client-Side JSON Schema to TypeORM Entity Converter
Zero Server UploadsTransform JSON Schema definitions into production TypeORM TypeScript entities with @Entity, @PrimaryGeneratedColumn, @Column, @CreateDateColumn, enums, and relations.
Conversion Error
Standard Decorator Syntax
Generates production-grade decorators including @Entity(), @PrimaryGeneratedColumn(), @Column(), @CreateDateColumn(), and @UpdateDateColumn() compatible with both standalone Node.js and NestJS microservices.
Inverted Nullability Semantics
JSON Schema properties are optional by default. Fields defined in the "required": [...] array become non-nullable in TypeORM, while omitted properties receive @Column({ nullable: true }) and TypeScript null unions.
Smart Primary Keys & Relations
Automatically infers primary key strategies (UUID vs auto-increment integers) and synthesizes @ManyToOne() and @JoinColumn() relationships from $ref pointer linkages.
Why Use This JSON Schema to TypeORM Entity Converter?
How to Use JSON Schema to TypeORM Entity Converter
Input JSON Schema
Paste your JSON Schema or upload a .json file into the editor.
Configure Output
Choose table naming conventions, relation inclusions, and docstring formatting.
Copy or Download
Copy the generated TypeORM entity TypeScript code or download entities.ts immediately.
JSON Schema to TypeORM Entity Conversion example
Demonstrates automated generation of a TypeORM User entity class with @PrimaryGeneratedColumn, non-nullable email column, and nullable bio column based on inverted nullability.
{
"title": "User",
"type": "object",
"properties": {
"id": { "type": "integer" },
"email": { "type": "string" },
"bio": { "type": "string" }
},
"required": ["id", "email"]
}
import { Column, Entity, PrimaryGeneratedColumn } from 'typeorm';
@Entity('users')
export class User {
@PrimaryGeneratedColumn()
id: number;
@Column()
email: string;
@Column({ nullable: true })
bio: string | null;
}
Technical Specifications & Engine Details
| Specification | Details |
|---|---|
| Supported Decorators | @Entity, @PrimaryGeneratedColumn, @Column, @CreateDateColumn, @UpdateDateColumn, @ManyToOne, @JoinColumn |
| Primary Key Strategies | Auto-increment (@PrimaryGeneratedColumn()) and UUID (@PrimaryGeneratedColumn("uuid")) |
| Nullability Mapping | JSON Schema required array → non-nullable column, optional → nullable: true |
| Execution Mode | 100% Client-Side In-Browser (Zero server latency) |
| Framework Compatibility | TypeORM 0.3+, NestJS, Express, Node.js |
100% Client-Side Privacy Guarantee
Your files remain strictly on your local device. Zero data is transmitted to external servers.
Frequently Asked Questions
How are JSON Schema required properties mapped to TypeORM entities?
Are the generated entities compatible with NestJS?
How are primary keys detected and generated?
Does the converter support relations between multiple entities?
Methodology
Validates inverted nullability, primary key detection, column decorators, enums, and relations without external dependencies or sponsored ranking.
Last updated .