SQL schema visualizer
Paste your CREATE TABLE statements and instantly see an entity-relationship diagram. Visualize tables, columns, types, and foreign key relationships — all in your browser.
Paste DDL above to generate a diagram.
What is an ER diagram?
An entity-relationship (ER) diagram is a visual representation of a database schema. Each table is shown as a box containing its columns and types, and lines between boxes represent foreign key relationships. ER diagrams make it easy to understand the structure of a database at a glance.
This tool generates ER diagrams directly from SQL DDL — the CREATE TABLE statements that define your schema. Paste your DDL and the diagram is rendered instantly, with no database connection required.
When to use a schema visualizer
- Onboarding to a new codebase or database you haven't worked with before
- Reviewing migration files to understand the new schema shape
- Adding documentation to a project wiki or design doc
- Planning schema changes — paste your proposed DDL and see the structure
- Communicating database design to non-technical teammates
From static diagrams to live analytics
A schema diagram shows you the structure, but Basedash lets you actually query it. Connect your database and ask questions about your data in plain English — Basedash understands your schema, writes the SQL, and renders charts and dashboards automatically. It works with PostgreSQL, MySQL, BigQuery, Snowflake, and 750+ other data sources.
FAQ
What SQL syntax does this support?
Is my schema stored or sent to a server?
How are foreign keys detected?
Can I export the diagram?
Does it handle ALTER TABLE or other DDL?
Why are some relationships missing?
Skip the SQL — let AI build your charts
Connect your data and describe what you want to see. Basedash handles the query, visualization, and dashboard.