Generate SQL CREATE TABLE Statements from JSON

Infer database column types from JSON to create DDL statements for PostgreSQL, MySQL, and SQLite.

JSON to SQL DDL Table Creator

Infer SQL column types from JSON objects to generate CREATE TABLE statements for PostgreSQL, MySQL, and SQLite.

Sample JSON Input

Table Name

SQL Database Dialect

Generated SQL CREATE TABLE Statement

-- SQL DDL generated for POSTGRES
CREATE TABLE users (
    id                   BIGINT PRIMARY KEY,
    user_uuid            VARCHAR(255),
    full_name            VARCHAR(255),
    email                VARCHAR(255),
    age                  BIGINT,
    is_verified          BOOLEAN,
    account_balance      DOUBLE PRECISION,
    created_at           TIMESTAMPTZ,
    preferences          JSONB
);

About This Tool

JSON to SQL DDL Table Creator inspects JSON objects and infers suitable database column types (BIGINT, VARCHAR, TIMESTAMPTZ, JSONB, BOOLEAN) to produce CREATE TABLE statements across popular SQL dialects.

Key Features

Supports PostgreSQL, MySQL/MariaDB, and SQLite dialects

Automatic primary key and datetime inference

Handles nested objects and JSON data types

How to Use This Tool

Paste a JSON object or array of sample records.
Enter your desired table name and select SQL dialect (PostgreSQL, MySQL, SQLite).
Copy the generated SQL CREATE TABLE DDL query.

Why Use This Tool

Quickly scaffold relational database schemas when migrating from NoSQL or prototyping APIs.
Automatically recognizes primary keys (id) and timestamp strings.

Pro Tips

Review inferred VARCHAR lengths and add custom indexes as needed for high-scale production tables

Frequently Asked Questions

How does the tool handle nested JSON objects in SQL?

For PostgreSQL it generates JSONB columns, for MySQL JSON columns, and for SQLite TEXT columns.

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