New to IntelliJ?

Don’t have an IntelliJ-based IDE yet? JetBrains offers a unified distribution of IntelliJ IDEA that works without activation—no paid IDE subscription required.

JetBrains makes IntelliJ IDEA’s free features available for both non-commercial and commercial use.

Download and Install IntelliJ IDEA

1. Visit jetbrains.com/idea/download

2. Follow the instructions from the download page to install IntelliJ IDEA for your system using the method of your choice

3. Launch IntelliJ IDEA

Install the Plugin

1. Open Settings and navigate to Plugins > Marketplace

2. Search for Mermaid Studio Core (free) or Mermaid Studio (paid) and click Install

3. Restart the IDE when prompted

Not sure which edition to install? Compare editions →

Activate a License (optional for Core)

Mermaid Studio Core works immediately with free features. To unlock paid features, purchase a Core license and activate it:

1. Go to Settings > Plugins > Installed

2. Find Mermaid Studio Core and click the license/gear icon

3. Choose Subscription and sign in to your JetBrains account

Mermaid Studio requires a license. You’ll be prompted on first use:

1. Choose Start trial or Paid License

2. If using a paid license, select the license type (typically Subscription)

3. Sign in to your JetBrains account, or create one if you don’t have one yet

4. Complete the activation process

A JetBrains account is required for trial and license activation.

Next Steps

Head to Your First Diagram to start creating diagrams.

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Mermaid Studio is not affiliated with JetBrains s.r.o. IntelliJ IDEA usage is governed by the JetBrains User Agreement.