When comparing nomnoml vs Gravizo, the Slant community recommends nomnoml for most people. In the question“What is the fastest way to create and edit UML diagrams?” nomnoml is ranked 6th while Gravizo is ranked 11th. The most important reason people chose nomnoml is:
You can use the website even for sensitive content as nothing is sent to the server.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Everything runs client side
You can use the website even for sensitive content as nothing is sent to the server.
Pro Customizable
You can override the global styling for the diagram and you can also define custom types for the entities. It is really powerful.
Pro Free and open source
You can extend it, if you find something missing!
Pro Automatically saves
The browser-based tool automatically saves your changes to your localStorage, which is a nice and handy feature.
Pro Text format
The tool generates diagrams from a simple text format, which is easy to edit and you can even version control it.
Pro Fully fledged
It knows many types of UML entities and relationships so you will barely miss anything.
Pro Markdown syntax
Can be used on GitHub using Markdown image tag.
Pro URL
You can use an URL which will be rendered by Gravizo and include it in your website or blog.
Cons
Con Can't connect entities on different levels
The tool can't connect entities on different levels, for example a class and a class inside an other package.
Con Online only
No applications for local use in the free version.
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