JSON to DDL Generator

Create a starting CREATE TABLE statement from a JSON object. Nested values are stored as JSON/text for review.

Generated DDL is a draft. Verify constraints, indexes, relationships, and production data types.

About this Tool

This tool infers columns and SQL types from a JSON object and creates a starting DDL statement. Nested values are represented as JSON or text and the generated script must be reviewed before production use.

Why people use this tool

  • Turn a JSON sample into a draft SQL table definition quickly.
  • Choose PostgreSQL, MySQL, SQLite, SQL Server, or Oracle syntax.
  • Use the result as a starting point for reviewing columns and data types.

How to use it

  1. Paste a representative JSON object into the input box.
  2. Select a database and enter the table name.
  3. Click Generate, then review types, constraints, indexes, and relationships before running the DDL.

Frequently Asked Questions

No. It creates a draft table from one JSON sample. Add keys, constraints, indexes, relationships, and migrations for your application.