Visualize your database schema

Automatically generate an interactive ER Diagram (ERD)
from your existing SQL cloud database

Trevor.io's ERD tool is 100% free to use!

Lightning fast to set up

Tables, columns and joins are detected automatically.

Always up-to-date

As your schema changes, your ER diagram automatically updates.

Easy to collaborate

Invite and work directly with your teammates

Trusted by

hundreds of companies
worldwide



What is an ER Diagram?

An ER diagram, ERD, or entity relationship diagram, is a graphical representation of your database schema. It shows the tables (or "entities") as boxes, with connecting lines representing the (foreign key) relationships that exist between them. Usually, a table's columns are displayed too, including the primary and foreign key columns, between which the connecting lines are drawn.

Create your diagram, fast

Everything you need to know to visualize your existing schema

1
Connect your database
Trevor.io supports a wide range of SQL databases
and automatically detects all tables, columns and joins for you.
PostgreSQL
MySQL
Redshift
SQL Server
MariaDB
Snowflake
Big Query
Coming soon!
MongoDB
Coming soon!
2
Create and arrange your diagram
Select which tables and columns should be included in your diagram by simply clicking "Add to map" from the left sidebar. Foreign key relationships are detected automatically.
3
Always up-to-date
We use foreign keys and standard naming conventions to automatically detect the relationships between your database tables. You can also easily add / modify these joins by hand. This means that your diagram stays effortlessly up-to-date whenever your schema changes.

We do the heavy lifting for you

Trevor.io is used by hundreds of companies worldwide to empower their teams to get answers from their database data in just a few clicks. No SQL knowledge required. Set up Trevor.io for your team and choose exactly what they do and do not have access to, and give your team data superpowers to answer their own data questions.

Chat with us Create your diagram

Gallery

Chat with us Create your diagram
© Trevor Technology Limited, 2020