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About JSON to SQL Schema

Convert JSON Data into SQL Table Schemas at Online Tool Base.

The JSON to SQL Schema tool allows developers to quickly generate relational database schemas based on a JSON data instance. Whether you are migrating NoSQL data to a SQL database or prototyping a backend based on a frontend API mock, ensuring your database tables match your data structure is critical. This tool inspects the structure of your JSON object and generates the `CREATE TABLE` statements necessary to store that data.

Prototype Faster

Inferring schema from data is a huge time-saver. The tool looks at keys to determine column names and looks at values to guess data types (INT, VARCHAR, BOOLEAN, DECIMAL). It handles nested objects by suggesting separate tables or foreign key relationships logic (conceptually), though for simplicity it often flattens or serializes deep structures depending on the mode.

Key Features

  • Type Guessing: Distinguishes between integers, floating-point numbers, booleans, dates, and strings.
  • SQL Syntax: Generates standard SQL compatible with MySQL, PostgreSQL, and SQLite.
  • Auto-Increment IDs: Automatically adds a primary key `id` column to the generated table definition to ensure best practices.
  • Clean Formatting: Output is formatted with proper indentation and casing for readability.

Usage Guide

  1. Paste a single JSON object or an array of objects.
  2. The tool analyzes the keys and value types.
  3. It constructs a `CREATE TABLE table_name (...)` statement.
  4. You can run this SQL query in your database management tool (phpMyAdmin, DBeaver, etc.) to set up your tables.

Bridge the gap between document storage and relational storage with this handy schema generator from Online Tool Base.