Plan your database before you write a line of SQL
Lay out every table and the foreign keys between them, and shape the design together with your team. When it's right, Maowl writes the CREATE TABLE statements for you.
Open Maowl Free to start. No account needed. Explore a sample model
SQL that's ready to run
Give each column a data type and mark the primary key. Maowl turns your design into clean CREATE TABLE statements for PostgreSQL, MySQL, SQL Server, or SQLite, with every primary key and foreign key in place.
Start from what you have
Drop in a schema dump, and every table appears as a card, foreign keys and all. Planning from a spreadsheet? Paste a list of names, and each one becomes a table. Or ask Claude or ChatGPT for a first draft.
Tidy up in one click
Click Arrange, and Maowl untangles crossing lines and spaces out your tables and notes so nothing overlaps. The result is clean enough to drop straight into a design doc or a slide.
Big schemas, made readable
Split a growing database into layers, such as billing and inventory, then show, hide, or lock each one. Hide the Columns layer to see only your tables and how they connect.
Keep the “why” with the tables
Pin design decisions and open questions to the tables and foreign keys they're about. Notes move with your tables, and they never end up in your SQL.
Plan together in real time
Invite teammates to edit or view. You'll see each other's changes, selections, and pointers the moment they happen, and you can restore an earlier version whenever you need one.
Your next database starts here
Explore one of our sample models, browse the guide, or open Maowl and start your first model.