MarkChart - Mermaid Editor

Mermaid diagrams

Free · In‑App Purchases

222 Ratings
Ages

4+
Years
Category

Developer Tools
Developer

Alexandre Colucci
Language

EN
+ 6 More
Size

9.8
MB

MarkChart is designed exclusively for previewing and editing Mermaid diagrams. Start with a built-in template to instantly create sequence diagrams, state diagrams, flowcharts, and more. Or begin with a blank document to write your own diagram from scratch. MarkChart can also be used in combination with an external editor, diagrams automatically update when changes are made. Mermaid is a Markdown-inspired text syntax to define diagrams. MarkChart will render a nice looking sequence diagram if you write the following text in your Markdown documentation: ```mermaid sequenceDiagram Alice->>John: Hello John, how are you? John-->>Alice: Great! Alice-)John: See you later! ``` PREVIEW Effortlessly preview Mermaid diagrams without using complex tools. EDITOR Create and edit your Mermaid diagrams directly in MarkChart. TEMPLATES Instantly create sequence diagrams, state diagrams, flowcharts and more. QUICK LOOK Preview your .mmd and .mermaid files right from the Finder. EXPORT Easily export your graphs to PDF, PNG, and SVG formats. SHORTCUTS Create automations with the Shortcuts app. SYNTAX HIGHLIGHTING Gain a better understanding of the text defining your diagram with syntax highlighting. LIVE UPDATES Instantly view changes as you save the Mermaid diagrams in your preferred external editor. COMMAND LINE Create PDF, PNG, and SVG from the Terminal. FITS RIGHT AT HOME MarkChart is optimized for Apple Silicon and macOS, with Dark Mode support. MARKCHART PRO MarkChart Pro is an optional one-time purchase to help support the development. ••• Privacy Policy: https://markchart.app/privacypolicy/ Terms of use: https://markchart.app/terms/ If you have any questions or ideas, please reach out at support@markchart.app

Ratings & Reviews

4.6

out of 5

222 Ratings

Great tool, though not clear what version of Mermaid it supports
Mar 5

darahalian
This is exactly the kind of tool I was looking for that allows me to write diagrams with my text editor of choice with all its features and shortcuts that I'm used to, and see the diagram rendered immediately on saving the file. It also has some nice export options for the rendered diagrams. Overall, worth the 9 bucks for the full version.My only issue so far is that it does not specify anywhere what version of the Mermaid standard it supports. The help and FAQ link to the official Mermaid site for reference on Mermaid syntax which implies it should support everything documented there, but I have noticed it doesn't support newer features such as central connections and half arrows on sequence diagrams, and it also does not support combining aliases with participant type configuration on sequence diagrams either.It would be useful if the Mermaid version the app supports was listed somewhere (such as the FAQ or Release Notes), to make it clear what features should be expected to be supported.
Great tool, though not clear what version of Mermaid it supports
Mar 5

darahalian

This is exactly the kind of tool I was looking for that allows me to write diagrams with my text editor of choice with all its features and shortcuts that I'm used to, and see the diagram rendered immediately on saving the file. It also has some nice export options for the rendered diagrams. Overall, worth the 9 bucks for the full version.My only issue so far is that it does not specify anywhere what version of the Mermaid standard it supports. The help and FAQ link to the official Mermaid site for reference on Mermaid syntax which implies it should support everything documented there, but I have noticed it doesn't support newer features such as central connections and half arrows on sequence diagrams, and it also does not support combining aliases with participant type configuration on sequence diagrams either.It would be useful if the Mermaid version the app supports was listed somewhere (such as the FAQ or Release Notes), to make it clear what features should be expected to be supported.
Intuitive and Geared for Success
Jan 17

uuklanger
I am pretty jazzed. I have been wanting an app like this because Mermaid is a very handy, portable, and powerful way to visually show how something should work, be in time, perform, and flow. The challenge, similar to markdown itself, is learning the syntax. This app helps you with this by providing templates that you can start with and direct links to documentation where a specific detail is needed. For someone exploring Mermaid, these features built in to the foundation of this app are valuable. I have already learned several new things thanks to this feature. The UI is clean and easy to use. For the price it is a no brainer to get.
Intuitive and Geared for Success
Jan 17

uuklanger

I am pretty jazzed. I have been wanting an app like this because Mermaid is a very handy, portable, and powerful way to visually show how something should work, be in time, perform, and flow. The challenge, similar to markdown itself, is learning the syntax. This app helps you with this by providing templates that you can start with and direct links to documentation where a specific detail is needed. For someone exploring Mermaid, these features built in to the foundation of this app are valuable. I have already learned several new things thanks to this feature. The UI is clean and easy to use. For the price it is a no brainer to get.
Works great, and easy to use. Recommended.
11/05/2025

Progeny16
I tried a different, cheaper app, and it was useless. This app, with its $9 price tag for pro (so you can export PDFs) is well worth it — a bargain, really, because it saved me so much time. The app is easy to use, with a clean and clear user interface, and plenty of templates and custom capabilities. Recommended.
Works great, and easy to use. Recommended.
11/05/2025

Progeny16

I tried a different, cheaper app, and it was useless. This app, with its $9 price tag for pro (so you can export PDFs) is well worth it — a bargain, really, because it saved me so much time. The app is easy to use, with a clean and clear user interface, and plenty of templates and custom capabilities. Recommended.
Almost there
02/21/2025

ke4vtw
This is quite good... however, I can't seem to change my background color to white. If I use the base theme and set the background color, the setting is ignored.I'd also like the ability to set a zoom factor when exporting images. Other than that, I have absolutely no complaints. It works as advertised, is fast, and seems to be stable.Fixing those two issues will each earn back a star in the review!

Developer Response
Thank you for your feedback! We’re happy to share that in the latest version of MarkChart, PNG exports now have a transparent background by default. You can also customize the background color in the preferences. —Alex
Almost there
02/21/2025

ke4vtw

This is quite good... however, I can't seem to change my background color to white. If I use the base theme and set the background color, the setting is ignored.I'd also like the ability to set a zoom factor when exporting images. Other than that, I have absolutely no complaints. It works as advertised, is fast, and seems to be stable.Fixing those two issues will each earn back a star in the review!
Developer Response 03/13/2025
Thank you for your feedback! We’re happy to share that in the latest version of MarkChart, PNG exports now have a transparent background by default. You can also customize the background color in the preferences. —Alex

- MarkChart is now available in Japanese, Traditional Chinese and Simplified Chinese - Bug fixes and improvements If you’re happy with the app, please rate it, or even leave a review. This is a great way to help!

Version 7.1 Mar 26

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Supported Features
- VoiceOver
- Dark Interface
- Differentiate Without Color Alone

Information

Seller: Alexandre Colucci
Size: 9.8 MB
Category: Developer Tools
Compatibility: Requires iOS 18.2 or later.

iPhone
Requires iOS 18.2 or later.

iPad
Requires iPadOS 18.2 or later.

Mac
Requires macOS 13.5 or later.

Apple Vision
Requires visionOS 2.2 or later.
Languages: English and 6 more

English, French, German, Japanese, Simplified Chinese, Spanish, Traditional Chinese
Age Rating: 4+

4+

Learn More
In-App Purchases: Yes

MarkChart Pro $8.99

Learn More
Copyright: © 2024, Alexandre Colucci

Developer Website

Privacy Policy

Supports

Family Sharing

Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More

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MarkChart - Mermaid Editor

Ratings & Reviews

Great tool, though not clear what version of Mermaid it supports

Intuitive and Geared for Success

Works great, and easy to use. Recommended.

Almost there

What’s New

App Privacy

Data Not Collected

Accessibility

Supported Features

VoiceOver

Dark Interface

Differentiate Without Color Alone

Information

Supports

Family Sharing

More by Alexandre Colucci

DotChart for DOT and Graphviz

You Might Also Like

MermaidEditor

ParseLab

Markdown Editor for Safari

CAOCAP

LispPad Go

NerdyNotes

Mondroid

API Dash - API Client, Testing

Data Modeler

Carnets - Jupyter