ERD Designer
New
Save
Delete
+ Entity
+ Relationship
Auto Layout
Fit to Screen
Import DDL
Import DB
Settings
Import DDL
ERD Name
DDL
Or upload file
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Import
Import from Database
ERD Name
Driver
PostgreSQL
MySQL
SQL Server
Oracle
Snowflake
DuckDB
Schema
Connection String (DSN)
DSN examples
Postgres:
postgres://user:pass@host:5432/db?sslmode=disable
MySQL:
user:pass@tcp(host:3306)/dbname
SQL Server:
sqlserver://user:pass@host:1433?database=dbname
Oracle:
oracle://user:pass@host:1521/service
Snowflake:
user:pass@account/db/schema?warehouse=WH
DuckDB:
path/to/file.duckdb (or :memory:)
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Import
Add Relationship
From Entity
From Field
To Entity
To Field
Cardinality
One to Many
One to One
Many to Many
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Add
Settings
Relationship Endings
From side (source)
Auto (from cardinality)
None
Arrow
One (single bar)
Many (crow's foot)
To side (target)
Auto (from cardinality)
None
Arrow
One (single bar)
Many (crow's foot)
Show relationship labels on lines
Layout
Direction
Top to bottom
Left to right
Entity width
Horizontal gap
Vertical gap
Max columns per row (0 = auto)
Display
Relationship line color
Grid snap (px, 0 = off)
Zoom sensitivity
Reset Defaults
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Save Settings