Free online ER diagram maker

Effortlessly make ER diagrams online for free with our rich templates and symbols.

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Free ER diagrams templates from EdrawMax

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ER Diagram for Car Booking

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BUS ER Diagram

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Restaurant Management ER Diagram

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Library ER Diagram

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Hotel ER Diagram

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E-commerce ER Diagram

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Why Use EdrawMax ER Diagram Maker?

Get inspired by tons of templates

Draw inspiration from one of our professionally made templates. Browse through a wide range of templates tailored to various industries and purposes, helping yourself save time and effort by providing a starting point for your diagrams.

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Easy-to-use Visio alternative

With a sleek and intuitive interface, EdrawMax offers similar powerful functions as Visio but is much easier to use. Streamline diagram creation with EdrawMax’s drag-and-drop functionality, extensive library of shapes and symbols, and rich editing tools.

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Work from anywhere, at any time

Access your diagrams on Windows, Mac OS, Linux, or even mobile devices. Edit your diagrams online whenever you have a connection to the Internet. Make changes, updates, or collaborate with team members regardless of your location.

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Share your files in all formats

Easily share your diagrams with colleagues or stakeholders, regardless of their preferred file format, as EdrawMax offers a wide range of export options like PDF or PNG or even editable formats like Word, Excel, or PowerPoint.

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How to make an ER diagram in 3 Simple Steps

step 1 of making an ER diagram: choose a template

step 2 of making an ER diagram: personalize diagram

step 3 of making an ER diagram: export diagram

What our users say

Justin Kramer, Technical Project Manager

I needed something to show our clients how their data was actually going to flow without their eyes glazing over. Most diagrams look a bit dodgy, but this one makes everything look proper professional. It’s dead easy to use—I’m not a DBA by any stretch, but I managed to whip up a complex relational map in about twenty minutes. The drag-and-drop is spot on and it’s saved us a lot of back-and-forth during the discovery phase. Sorted.

Lily Harper, Junior Data Analyst

Okay, so I’m still pretty new to SQL and normalization, and trying to draw these out by hand was a literal nightmare. This tool is honestly so clutch. The templates are a lifesaver because I don’t always know where to start, and the interface isn't intimidating at all. It actually makes the whole "cardinality" thing make sense visually. Plus, the diagrams look really clean for my reports—no more janky screenshots. Total game changer for my workflow.

Julia Bennett, Database Architect

I’ve been around the block with modeling tools, and usually, you’re stuck choosing between something overpriced or something that crashes the moment you add fifty tables. Wondershare hits that sweet spot. The reverse engineering feature—pulling the schema straight from the DB—is top-notch and saves me a massive amount of grunt work. It handles many-to-many relationships without making a mess of the connectors. It’s a solid, reliable bit of kit that doesn't cost an arm and a leg.

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FAQs About EdrawMax ER Diagram Tools

What is an Entity-Relationship (ER) diagram?

An Entity-Relationship (ER) diagram is a visual tool used in database design to represent the logical structure of a system. It illustrates how different entities, such as people, objects, or concepts, relate to one another within a database. These diagrams help developers plan and communicate complex data requirements clearly.
What are the primary components of an ER diagram?

The three fundamental components are entities, attributes, and relationships. Entities represent real-world objects or concepts, while attributes describe the specific properties of those entities. Relationships define how the entities interact with each other. Together, these elements provide a comprehensive blueprint for organizing data logically before implementing a physical database.
What exactly is an entity in the context of database modeling?

In an ER diagram, an entity is a distinct object, person, or event that stores data. For example, in a school system, "Student," "Teacher," and "Course" are entities. They are typically represented by rectangles. Entities are the building blocks of the database, representing the core things being tracked.
What does cardinality represent in an ER model?

Cardinality defines the numerical constraints of a relationship between entities, such as one-to-one, one-to-many, or many-to-many. It clarifies how many instances of one entity can be associated with instances of another. This is crucial for maintaining data integrity and understanding the specific business rules of the database system.
How does an ER diagram differ from a relational schema?

An ER diagram is a high-level conceptual model focusing on business requirements and relationships. In contrast, a relational schema is a more technical representation that details the actual table structures, including data types and foreign keys. The ER diagram serves as the initial blueprint for the final relational schema.