Sketch a schema the way you would on a whiteboard. Load the sample or start from a blank canvas, add collections and fields, and drag between the dots to link them. Everything stays in your browser. No database, no account.
Start from an example e-commerce model, or clear the canvas and build your own from scratch.
Move cards around, scroll to zoom, and drag between the blue field dots to draw a relationship.
This tool never connects to a database. Nothing you type leaves the page. Copy the JSON any time.
A visual schema (or entity-relationship diagram) is a map of your database, the collections or tables, their fields, and the relationships between them. Being able to see that structure at a glance is essential for designing a new data model, onboarding onto an existing one, spotting missing relationships, and communicating your design to a team.
Relational (SQL) schemas use tables, columns, primary keys, and foreign keys with fixed structure. MongoDB is flexible-schema: documents can nest and vary, and relationships are expressed by references or embedding. This designer supports both, pick a database when you start a blank canvas.
No. This designer is entirely client-side, you sketch a schema from a sample or a blank canvas, and nothing is sent anywhere. To generate a diagram from a live database, use VisuaLeaf.
An entity-relationship diagram shows entities (tables/collections), their attributes (fields), and how they relate, the standard way to represent a database schema visually.
Yes. Choose MongoDB for collections/fields or a SQL dialect (PostgreSQL, MySQL, and more) for tables and foreign keys when you start a blank canvas.
VisuaLeaf
VisuaLeaf generates a live, editable schema diagram straight from your MongoDB or SQL database, with automatic relationship detection, then lets you query, chart, and explore it all in one client.