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Exciting News: We will be launching a completely new site in May that will no longer require Silverlight!
Until the new version is available please use FireFox or Internet Explorer on Windows or Safari on Mac.
Looking for a textbook using ERDPlus?
ERDPlus is a web-based database modeling tool that lets you quickly and easily create:
  • Entity Relationship Diagrams (ERDs)
  • Relational Schemas (Relational Diagrams)
  • Star Schemas (Dimensional Models)
Two ways to get started
  • Save documents on our server
  • Access your documents from any Mac or PC
  • Import and export documents to share with others
  • Save documents on your own computer
Runs in your browser using Silverlight.
On a Windows PC:
Chrome 12+ Firefox 3.6+ Internet Explorer 8+
On a Mac:
Safari 4+

Due to recent changes in Safari for Mac please note that exporting files from ERDPlus requires changing one setting in Safari's preferences. Click here for more information and instructions.

ERDPlus enables drawing standard ERD components:
  • Entities
  • Attributes
  • Relationships
ERDPlus enables drawing standard Relational Schema components:
  • Tables (Relations)
  • Table Columns (including Primary and Foreign Keys)
  • Referential Integrity Constraint Lines (depictions of relationships in relational model)
ERDPlus enables drawing Star Schema components:
  • Fact Tables (Facts)
  • Dimension Tables (Dimensions)

News and Updates

September 25, 2014
  • Work has started on an HTML5 version that will no longer require Silverlight!
February 3, 2014
  • Added workaround note for Safari on Mac
February 15, 2013
  • Fixed a problem that prevented loading Relational Schemas or Star Schemas from the documents list.
January 24, 2013
  • Fixed bug affecting users who created an account and try to export an image of a diagram.
January 12, 2013
  • Launched new website to save documents on our server! Create an account to get started.
December 26, 2012 August 25, 2012
  • Fixed undo-redo bugs affecting relational schemas
August 1, 2012
  • Launched new website
  • Added 3 new videos
    Watch them below or on our YouTube channel

Other Resources