🗄️SQL DDL to TypeScript & Zod Converter Documentation & Guide
Web & Developer
The SQL DDL to TypeScript & Zod Converter parses SQL CREATE TABLE statements across PostgreSQL, MySQL, SQLite, and MariaDB to generate strongly typed TypeScript interfaces and runtime Zod validation schemas. It maps database datatypes, handles nullability and primary keys, and preserves end-to-end type safety between your database and backend runtime.
📋How to Convert SQL DDL to Types
- Paste SQL Statement: Paste a SQL CREATE TABLE definition or pick a database table preset (Users, Products, Sessions).
- Configure Type Options: Choose whether dates map to native Date objects or ISO strings, and toggle snake_case to camelCase.
- Execute Conversion: Click 🗄️ Convert SQL to Types to extract column definitions, constraints, and data types.
- Switch & Copy: Toggle between TypeScript Types and Zod Schemas tabs and click 📋 Copy to transfer definitions to your codebase.
⚙️Grammar Parsing & Datatype Mapping Rules
SQL dialect parser interprets column tokens and translates database constraints into type algebra:
• Constraint & Nullability Logic: Columns lacking NOT NULL (and not marked PRIMARY KEY) are automatically mapped to optional and nullable union types (? and | null).
• SQL Type Equivalents: Maps VARCHAR/TEXT/UUID to string, INT/BIGINT/DECIMAL to number, BOOLEAN to boolean, JSON/JSONB to Record, and arrays to typed T[].
• Zod Runtime Coercion: Generates z.coerce.date() or z.string().datetime(), z.string().uuid(), and handles nested .nullable().optional() modifier chains.
• Multi-Dialect Compatibility: Recognizes standard ANSI SQL constructs alongside PostgreSQL (SERIAL, TIMESTAMPTZ, UUID), MySQL (TINYINT), and SQLite syntax.
💡Practical Use Cases & Full-Stack Development
- ORMs & Query Builders: Create clean TypeScript model types for Kysely, Slonik, or raw database clients from legacy migration files.
- API Request Validation: Generate Zod validation schemas matching database table shapes for Next.js Server Actions and Express handlers.
- Database Migration Modernization: Rapidly transform legacy SQL database dumps into modern typesafe TypeScript repositories.
100% Client-Side Privacy Guarantee:All SQL statement parsing and code synthesis run 100% locally in your browser session. Proprietary database structures, column names, and table definitions remain completely private.
