Miro Logo
Homediagrammingblock diagram

An easy-to-use block diagram maker

Block diagrams help you visualize systems, creating a common understanding for development teams. Get started in seconds with our free block diagram maker, and make sure everyone is rowing in the same direction.

Over 50M users love Miro

More than just a block diagram creator

Diagram your connections, model objects, and visualize your system complexity with a block diagram online. Invite your team to work with you directly on your board and plan out new systems or quickly iterate on existing ones.

Why Miro is the best tool for diagramming

Quickly visualize interactions

Easily model complex systems and visualize interactions in one shared space. Miro’s block diagram creator allows you to diagram workflows, software development, hardware design, or any other non-technical algorithm with just a few clicks.

Communicate your vision

Use a ready-made diagramming UML shape pack that easily represents your block diagram components, and make co-creation simple. Tag team members in comments and seamlessly align on the same vision.

Reduce complexity

Miro’s block diagram maker allows you to visualize entire systems, no matter how complex. Use our infinite canvas to illustrate your block diagram in its totality and visually communicate technical flows to everyone, even to non-technical stakeholders.

Iterate and innovate

Miro’s block diagram maker helps you zoom out, allowing you to see entire systems at a glance, all in one board. Turn the infinite canvas into an exploration field and create the conditions for creative solutions.

Break down silos

Improve cross-functional collaboration by inviting other teams to access your board. Miro’s visual collaborative space makes capturing and organizing ideas easy with comments, sticky notes, and video.

Share it

Share your board with the whole team with just a few clicks, or download your block diagram as an image or PDF file. Quickly circulate your block diagram so stakeholders can weigh in and move projects forward.

Related templates

Gain a better understanding of your current systems and build new ones.

Understand how the elements of your database interact with each other.

Improve internal processes and better lead development teams.

Plan object-oriented systems in a joint workspace that fosters collaboration and innovation.

Understand how external entities affect your system at a high level with a context diagram.

Map out any process with ease.

How to create a block diagram


Map out system components

Select the UML shapes representing your systems blocks. Identify the connections and interactions, and add the connector lines.


Label the blocks

Add names to each component and a legend to the connector lines for input and outputs. Add arrows representing your system’s flows.


Make it yours

Color-code your block diagram to identify stages and processes. Drag and drop any icons you need. Resize and frame your block diagram to fit your presentation or working board.

Integrated with your favorite tools

Ideas, inspiration, and intel in full view. Visualize marketing campaigns and client and prospect info to take action, and track tasks and status updates for the team.

Connect Miro to 1OO+ of your favorite collaboration tools

“Miro helps solve one of the major gaps in product design: how to manage tasks across product designers whose projects are in different tools.”

Jane Ashley

Head of Design at DocuSign

Block diagram maker FAQs

Do you have block diagram templates to get started?

Use our Block Diagram Template to start diagramming, or browse our community templates to leverage your knowledge and get inspired.

Read more


What is a block diagram?


Flowcharts: The definitive guide


A simple guide to using and creating a context diagram


What is a network diagram, and how to create one?

Other Miro solutions


Miro’s all-in-one diagram maker removes the hassle of switching between diagramming and collaboration tools while helping you check off all the essential steps of your diagramming process.

UML diagrams

Visualize, build, and document software systems and processes with a UML diagram. Design and communicate technical plans with a unified language that everyone understands.

ER diagram tool

Link and understand the different elements of your database and show how they interact with an ER diagram tool. Reduce complexity and visualize how your system entities connect and overlap, bringing agility to teams.

Get on board in seconds

Join thousands of teams using Miro to do their best work yet.