# ERDPlus

> ERDPlus is a free, web-based database modeling tool for creating Entity-Relationship Diagrams (ERDs), Relational Schemas, and Star Schemas, and for generating SQL. It runs in the browser with no installation required and is used by students, academics, and professionals in over 180 countries.

## What you can do with ERDPlus
- Create Entity-Relationship Diagrams (ERDs) with regular and weak entities, all attribute types, and every cardinality constraint.
- Design Relational Schemas with primary/foreign keys, data types, and constraints (normalization up to 3NF).
- Build Star Schemas with fact and dimension tables for data warehousing.
- Generate SQL DDL automatically from your diagrams.
- Write, execute, and visualize SQL queries against premade practice schemas.
- Export diagrams as PNG images.

## Key facts
- Price: Free.
- Platform: Web browser (no installation).
- Account: A free account lets you save and import diagrams.

## Key pages
- Home: https://erdplus.com/
- About & FAQ: https://erdplus.com/about
- Try it (free editor): https://erdplus.com/trial
- Sign up: https://erdplus.com/sign-up
- Privacy Policy: https://erdplus.com/privacy-policy
- Terms of Service: https://erdplus.com/terms-of-service

## Contact
- Email: info@erdplus.com