Schema & SQL DDL Generator

Generate optimized SQL CREATE TABLE and INSERT scripts from CSV/JSON

🔒 100% Local ProcessingYour input data is processed entirely in your browser. It is not uploaded to any server.

Configuration

Database Type

Table Name

Delimiter

Include DROP TABLE statement

Generate INSERT statements

Auto-detect primary key

Input Data

Generated SQL

Schema to SQL DDL Generator Documentation

What is this tool?

This tool converts data schemas from CSV and JSON formats into SQL DDL statements (CREATE TABLE) and INSERT statements. It automatically infers column data types from the input data and generates database-specific SQL syntax for multiple database systems.

Key Features

Multiple input formats: CSV and JSON array support
Automatic data type inference from values (INT, VARCHAR, DATE, TIMESTAMP, BOOLEAN, etc.)
Support for 5 major databases (MySQL, PostgreSQL, SQL Server, SQLite, Oracle)
Auto-detect primary key columns (id, *_id)
Optional DROP TABLE and INSERT statement generation

How Data Types Are Detected

The tool scans your input data (up to the first 1000 rows) and uses regex pattern matching to identify integers, floating-point numbers, dates, booleans, and UUIDs. This automatic detection helps generate accurate column definitions:

Scans up to 1000 rows to analyze value patterns
Uses regex matching for INT, DECIMAL, DATE, TIMESTAMP, BOOLEAN, and UUID types
Falls back to VARCHAR (text) for columns with mixed or unrecognized types

Common Use Cases

Quick database table creation from CSV exports or spreadsheets
Migrating JSON data structures to relational databases
Generating test database schemas with sample data
Converting API responses to database tables

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