SQL to JPA Entity Converter | Free Hibernate Tool

SQL to JPA Entity Converter

Convert SQL CREATE TABLE statements to JPA/Hibernate entities in seconds. Generate @Entity, @Table, @Column annotations, and relationship mappings—100% client-side, no server uploads.

⚡ Instant Generation

Paste SQL DDL, get JPA entities in milliseconds. No waiting, no API calls.

🔒 100% Private

All processing happens in your browser. Your SQL never touches our servers.

🎯 JPA-Optimized

Generates @Entity, @Table, @Column, @Id, and relationship annotations automatically.

📦 Hibernate Ready

Perfect for Spring Data JPA, Hibernate ORM, and database-first development.

Convert SQL to JPA Entity

SQL Input

Java Output

How to Convert SQL to JPA Entity: Step-by-Step

Step 1: Paste Your SQL DDL

Copy your CREATE TABLE statement from your database schema:

CREATE TABLE users (
  user_id BIGINT PRIMARY KEY AUTO_INCREMENT,
  username VARCHAR(50) NOT NULL,
  email VARCHAR(100) NOT NULL UNIQUE,
  is_active BOOLEAN DEFAULT TRUE,
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

Step 2: Configure JPA Annotations

The tool automatically generates JPA/Hibernate annotations. Common ones include:

  • @Entity – Marks the class as a JPA entity
  • @Table – Maps to the database table name
  • @Id – Marks the primary key field
  • @Column – Maps fields to database columns with constraints
  • @GeneratedValue – Configures auto-increment strategy

Step 3: Get Your JPA Entity

Instantly receive production-ready JPA entity code:

import lombok.Data;
import javax.persistence.*;
import java.time.LocalDateTime;

@Data
@Entity
@Table(name = "users")
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "user_id")
    private Long userId;
    
    @Column(name = "username", nullable = false, length = 50)
    private String username;
    
    @Column(name = "email", nullable = false, unique = true, length = 100)
    private String email;
    
    @Column(name = "is_active")
    private Boolean isActive = true;
    
    @Column(name = "created_at")
    private LocalDateTime createdAt;
}

Step 4: Add JPA Dependencies to Your Project

<!-- Spring Data JPA -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

<!-- Lombok (optional but recommended) -->
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <scope>provided</scope>
</dependency>

JPA Entities vs Manual JDBC: The Difference

FeatureWith JPA EntitiesManual JDBCBenefit
Object Mapping✅ Automatic with @Entity❌ Manual ResultSet mapping~50 lines saved per entity
CRUD Operations✅ repository.save(entity)❌ Manual SQL + PreparedStatement~30 lines per operation
Relationships✅ @OneToMany, @ManyToOne❌ Manual JOIN queriesType-safe navigation
Total Development TimeMinutesHours10x faster!

Frequently Asked Questions

Q: What’s the difference between JPA and Hibernate?

A: JPA (Java Persistence API) is the specification, while Hibernate is the most popular implementation. When you use Spring Data JPA, you’re using JPA annotations with Hibernate as the underlying ORM engine.

Q: Can I use this tool with existing databases?

A: Yes! This is perfect for database-first development. Export your CREATE TABLE statements from your database and convert them to JPA entities. The tool preserves column names, constraints, and data types.

Q: Does this support relationships (foreign keys)?

A: The tool generates basic entity mappings. For relationships (@OneToMany, @ManyToOne, @ManyToMany), you’ll need to add those annotations manually based on your schema design.

Q: Should I use this for new projects?

A: Absolutely! It’s great for both database-first (existing schema) and code-first (new projects) approaches. Generate entities from your schema design, then let Spring Data JPA handle the database operations.

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Convert your SQL to JPA entities in seconds. Free, secure, and instant.

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