Entity-Relationship Diagrams From a Plain English Data Model
Describe your tables and relationships once. Get a clean ERD with primary and foreign keys clearly marked — ready for a design review or a migration doc.
A new schema usually starts as a list of tables in a document. CloudSketch AI turns that description into an entity-relationship diagram with tables, columns, primary and foreign keys and crow's-foot relationships, so reviewers can understand the data model at a glance.
See an example
“An e-commerce database with users, orders, order_items, products, and categories tables. Each order belongs to a user and contains many order_items, each linked to a product, and each product belongs to a category.”
Drawing the diagram…
An example of the diagram this prompt describes. Your own result can differ in layout and detail.
Swipe sideways to see the whole diagram.
Proper PK/FK notation
Primary and foreign keys are labeled clearly so the diagram reads correctly to any engineer, not just the author.
Infers relationships
Describe entities in natural language — CloudSketch AI works out one-to-many and many-to-many relationships for you.
Documentation ready
Export for schema reviews, onboarding docs, or a migration RFC.
Where teams use it
Schema design reviews
Agree on tables and relationships before anyone writes a migration.
Documenting a legacy database
Paste existing table definitions and get a readable diagram of a database nobody has drawn before.
Teaching and interviews
Explain relational modelling with a clear, correct example.
Frequently Asked Questions
Can I start from an existing schema instead of a description?
Paste your table definitions (SQL DDL or a plain list of columns) into the prompt and CloudSketch AI will build the ERD from that instead of a from-scratch description.
Which databases does it work with?
The ERD is database-neutral, so it works for PostgreSQL, MySQL, SQL Server, Oracle and SQLite schemas alike. Mention the data types you use in your prompt if you want them shown.
Is the ERD generator free?
Yes. ERDs are on the free plan (10 diagrams a day with a free account, 3 without signing in). Pro removes the daily limit.