SQL to SQLModel Converter
Modernize your legacy database immediately. Convert raw CREATE TABLE statements into production-ready SQLModel classes for FastAPI.
Our engine auto-detects Types, Primary Keys, Nullability, and even suggests Foreign Key relationships.
Why SQLModel is the "Silver Bullet" for FastAPI
Historically, Python web dev meant duplication. You defined your schema twice: once in SQLAlchemy (for the DB) and once in Pydantic (for the API). SQLModel unifies this.
❌ The Old Way (Duplication)
id = Column(Integer, primary_key=True)
name = Column(String)
name: str
✅ The SQLModel Way (DRY)
id: int | None = Field(primary_key=True)
name: str
It acts as a Table AND a Validator. No more drift.
Under the Hood: How this Tool Works
We don't just find-and-replace strings. We parse the Semantic Intent of your SQL.
Smart Typing
Converst VARCHAR(x) to str with max_length=x automatically, ensuring your API validator matches your DB constraint.
Null Safety
Detects NOT NULL. If missing, it correctly types columns as Optional[str] (or str | None) to prevent runtime crashes.
Relationship Hints
See a column named user_id? We auto-inject a # TODO: Foreign Key comment to remind you to link tables.
Pro Tips: Unlocking Full Power
🔄 Zero-Config Migrations
Because SQLModel is SQLAlchemy, you can use Alembic's autogenerate feature out of the box.
It reads your new `SQLModel` classes (generated above) and writes the SQL migration scripts for you.
🚀 Rust-Powered Speed
Under the hood, SQLModel uses Pydantic V2, which is rewritten in Rust.
This means parsing thousands of rows from your DB into Python objects is nearly instant, removing the traditional "ORM Slowness" tax.
The 5-Minute Migration Roadmap 🗺️
Run pg_dump -s or SHOW CREATE TABLE to get your raw DDL.
Paste into this tool to get your pristine Python Models.
Replace your SQLAlchemy Base classes with SQLModel.
Run your tests. Enjoy type safety and auto-completion!
Pattern Gallery: Handling Complex Types
See how we handle tricky database schemas that standard regex scripts often break on.