Mermaid diagrams in Notion can be a game-changer for anyone who loves visualizing information. Whether you're mapping out a workflow, creating a flowchart, or organizing your thoughts, Mermaid makes it easy to add these visuals directly to your Notion pages without needing separate graphic design software. Curious how to get started? Let's walk through everything you need to know to create and use Mermaid diagrams in Notion effectively.
What is Mermaid?
First things first, what exactly is Mermaid? Simply put, Mermaid is a tool that allows you to create diagrams and visualizations using a text-based syntax. Think of it as a way to code your diagrams. Instead of dragging shapes around or connecting lines manually, you write out what you want in a specific syntax, and Mermaid does the rest.
Mermaid supports a variety of diagram types, including flowcharts, sequence diagrams, Gantt charts, and more. The beauty of Mermaid lies in its simplicity. With just a few lines of text, you can create complex diagrams that are clean and easy to read. Plus, because it uses a text format, it's incredibly easy to update and maintain. Gone are the days of fiddling with a graphical interface to make minor adjustments.
Using Mermaid in Notion allows you to seamlessly integrate these diagrams into your notes, project plans, or documentation. With just a snippet of text, you can add diagrams that enhance your content and make your ideas more accessible. Now, let's see how to get this all working in Notion.
Setting Up Mermaid in Notion
Before we dive into the fun part. Creating diagrams, you'll need to set up Mermaid in Notion. Thankfully, this is a straightforward process that doesn't require any technical wizardry.
Mermaid is supported in Notion through the use of code blocks. Here's how you can set it up:
- Create a new block: In your Notion page, type
/code
to insert a code block. This is where you'll write your Mermaid syntax. - Select the language: Click on the language dropdown in the code block, and select Mermaid from the list. This tells Notion to interpret the text using Mermaid's syntax.
- Write your diagram code: Inside the code block, type out your Mermaid code. We'll cover specific examples in the next section, but it generally involves specifying the type of diagram and listing out the nodes and connections.
And that's it! You've set up a Mermaid diagram in Notion. As you type, you'll see a preview of your diagram right in the code block, updating in real-time. It's a bit like having your cake and eating it too. Both a textual representation and a visual diagram in one place.
Creating Your First Flowchart
Let's start with a simple flowchart. Flowcharts are perfect for mapping out processes or decision trees, and Mermaid makes them a breeze to create. Here's a basic example to get you started:
flowchart TD
A[Start] --> B{Decision}
B -->|Yes| C[Action 1]
B -->|No| D[Action 2]
C --> E[End]
D --> E
In the example above, we're creating a flowchart that starts with a decision point. Depending on the decision (Yes or No), it leads to different actions before reaching the end.
Here's a breakdown of the syntax:
flowchart TD
: This line initializes a top-down flowchart. You can also useLR
for left-to-right,RL
for right-to-left, and so on.- Nodes and Links: Each node is defined by an identifier (like A, B, C), followed by the text in brackets (like [Start]). Arrows (
-->
or--
) connect nodes, showing the flow. - Conditions: The decision node is a diamond shape, indicated by curly braces {Decision}. Branches are labeled with conditions like |Yes| and |No|.
As you add this code to your Notion page using a Mermaid code block, you'll see a visual flowchart appear, illustrating the process you've described. It's both simple and powerful, allowing you to convey complex processes with clarity.
Creating Sequence Diagrams
Sequence diagrams are another type of diagram you can create with Mermaid, and they're great for showing interactions between different parts of a system over time. Imagine you're working on a project where understanding these interactions is crucial. Sequence diagrams can be invaluable.
Here's a basic sequence diagram example:
sequenceDiagram
participant A as Alice
participant B as Bob
A->>B: Hello Bob, how are you?
B-->>A: I'm good, thanks for asking!
In this diagram, you have two participants: Alice and Bob. The arrows indicate messages sent between them. The syntax is straightforward:
sequenceDiagram
: Initializes a sequence diagram.- Participants: Defined with
participant
followed by an identifier and a label (e.g.,A as Alice
). - Messages: Arrows like
->>
or-->>
show messages sent between participants, with the message text following the colon.
By pasting this code into a Mermaid code block in Notion, you'll see a sequence diagram unfold, showing the interaction step-by-step. It's a fantastic way to visualize communication or data flow in a system.
Using Gantt Charts for Project Management
Gantt charts are a staple in project management, offering a visual timeline of tasks and milestones. With Mermaid, you can integrate Gantt charts into your Notion pages without needing additional software.
Here's an example of a simple Gantt chart:
gantt
title Project Timeline
dateFormat YYYY-MM-DD
section Development
Task A :active, a1, 2023-10-01, 30d
Task B : b1, after a1, 20d
section Testing
Task C : c1, 2023-11-01, 15d
Task D : d1, after c1, 10d
Here's a breakdown of what's happening:
gantt
: Initializes a Gantt chart.- Title: The chart's title is specified with
title
. - Date Format: Define the date format with
dateFormat
. - Sections: Organize tasks into sections using the
section
keyword. - Tasks: Each task is defined with a name, optional ID, start date, and duration (e.g.,
Task A :active, a1, 2023-10-01, 30d
).
In Notion, add this code to a Mermaid code block, and you'll see a Gantt chart that outlines your project's timeline. It's a great way to keep track of deadlines and dependencies.

Customizing Your Diagrams
One of the best things about Mermaid is its flexibility. You can customize your diagrams to fit your needs and make them visually appealing.
For example, you can change colors, styles, and even the shapes of nodes. Here's how:
flowchart LR
A[Start] --> B((Decision))
B -->|Yes| C[Action 1]
B -->|No| D[Action 2]
C --> E[End]
D --> E
style A fill:#f9f,stroke:#333,stroke-width:4px
style B fill:#bbf,stroke:#333,stroke-width:2px
In this updated flowchart, we've added style
statements to customize the appearance of nodes:
- Styles: The
style
keyword allows you to change the fill color, stroke color, and stroke width of nodes. - Shapes: You can use different shapes like circles ((Decision)) for decision points.
By tweaking these options, you can create diagrams that not only convey information but also match the aesthetic of your Notion page. It's all about making the diagrams work for you.
Collaborating with Mermaid Diagrams
Notion is known for its collaborative features, and Mermaid diagrams are no exception. You can work with your team to create and refine diagrams, making it a dynamic part of your documentation or brainstorming sessions.
Consider using Notion's sharing features to invite team members to view or edit diagrams. It's as simple as sharing a Notion page link, and your team can see and modify the diagrams in real-time. This is particularly useful when working on complex projects where input from multiple stakeholders is needed.
Plus, because Mermaid diagrams are text-based, they play nicely with version control. You can track changes, roll back to previous versions, and see who made which changes. It's a collaborative dream come true.
And speaking of collaboration, if you're looking to streamline your document creation process even further, you might want to check out Spell. It's a document editor with AI built-in, allowing you to draft, edit, and collaborate much faster than traditional tools.
Common Pitfalls and How to Avoid Them
While Mermaid is user-friendly, there are a few common pitfalls you might encounter. Let's tackle them so you can create diagrams without a hitch.
Syntax Errors
One of the most common issues is syntax errors. Mermaid requires precise syntax to interpret your diagrams correctly. If you see an error message or your diagram isn't rendering, double-check your syntax. Ensure that every bracket, arrow, and identifier is correctly placed.
Complex Diagrams
As diagrams grow in complexity, they can become difficult to manage. Break down complex diagrams into smaller parts if possible. Use comments within your Mermaid code to keep track of sections and elements. This makes it easier to troubleshoot and update your diagrams.
Browser Compatibility
While Mermaid is supported in modern browsers, older versions might not render diagrams correctly. Ensure your browser is up-to-date, and if you're having issues, try a different browser to see if the problem persists.
By keeping these potential issues in mind, you can ensure a smooth experience with Mermaid diagrams in Notion.
Advanced Tips for Using Mermaid
Once you've got the basics down, you're ready to delve into some advanced tips to make the most out of Mermaid in Notion.
Interactive Diagrams
Did you know you can make your diagrams interactive? By incorporating links into your nodes, you can create diagrams that lead to other Notion pages or external resources. Here's a quick example:
flowchart TD
A[Start] --> B{Decision}
B -->|Yes| C[Action 1]
C --> D[More Info](https://www.example.com)
In this example, clicking on "More Info" would take you to an external webpage. It's a handy way to create interactive documentation that guides readers through additional resources.


Embedding Mermaid Diagrams
If you want to use the same diagram across multiple Notion pages, consider embedding it. This way, any updates to the original diagram will automatically reflect wherever it's embedded. It saves time and ensures consistency across your documentation.
To embed a Mermaid diagram, use Notion's embedding feature. Copy the link to the page containing your diagram, and use the /embed
command to insert it into other pages.
As you explore these advanced tips, remember that tools like Spell can enhance your workflow even further. By integrating AI into your document creation process, you can produce polished, professional documents at lightning speed.
The Benefits of Using Mermaid in Notion
So, why use Mermaid in Notion? Here are a few reasons:
- Efficiency: Creating diagrams with text is faster than using graphical tools. You can quickly update and modify diagrams without altering the layout.
- Integration: Mermaid diagrams fit seamlessly into Notion pages, eliminating the need for external software or plugins.
- Collaboration: Text-based diagrams are easy to share and edit collaboratively. They integrate well with version control systems, making them ideal for team projects.
- Flexibility: With Mermaid, you can create a wide range of diagram types, from flowcharts to Gantt charts, all with the same tool.
Overall, Mermaid diagrams in Notion provide a versatile and efficient way to enhance your notes and documentation. Whether you're managing a project, visualizing a workflow, or brainstorming ideas, Mermaid's got you covered.
How Spell Can Enhance Your Notion Experience
Now, a quick note on how Spell can complement your Notion and Mermaid workflow. Spell is an AI document editor that helps you write and edit high-quality documents in seconds. It's like having Google Docs with AI built right in.
With Spell, you can generate drafts quickly, edit using natural language, and collaborate with your team in real-time. Imagine creating a polished document in a fraction of the time. It's perfect for those who want to streamline their document creation process while leveraging the power of AI.
By incorporating Spell into your toolkit, you can enhance your productivity and create documents that are not only visually appealing with Mermaid diagrams but also textually refined with Spell's AI capabilities.
Final Thoughts
Using Mermaid in Notion is a powerful way to visualize and share complex information effortlessly. From flowcharts to Gantt charts, you're able to integrate visuals into your notes seamlessly. And if you're looking to draft and refine your documents even faster, Spell can take your productivity to the next level. It's a tool I find incredibly useful for creating documents quickly and effectively. Whether you're a visual thinker or need to manage projects efficiently, Mermaid and Spell together can transform how you work in Notion.