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120 free browser-based developer utilities. No sign-up required.

draw.io
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PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
Which is more popular?
Based on our record, PlantUML seems to be more popular. It has been mentioned 16 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | devtoolstack.io | plantuml.com |
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| Company | — | Startup from France |
| Listed in |
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PlantUML - beautiful quick diagrams to explain your models
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PlantUML is a tool that allows you to write diagrams such as sequence, object, component, usecase, class diagrams and more.
PlantUML is an open source tool and syntax that allows you to make sequence, use case, class, object, and other diagrams from code. It also supports non-UML diagrams like JSON and YAML. In addition, it enjoys support...
For C4 Models, Mermaid support is still experimental. This shows as you have little control over the way the diagram is rendered, and some parts are unreadable (i.e., arrows over nodes). PlantUML works as you would...
Recommendations tracked on public social media and blogs since March 2021.


Tracking DeveloperToolStack since Aug 2026.
PlantUML — UML (class, sequence, use case, activity), C4 architecture, network diagrams, wireframes, JSON/YAML visualization. - Source: dev.to / 8 months ago
Diagram as code is the practice of defining diagrams in text instead of drawing them manually in a visual editor. Tools like Mermaid, D2, and PlantUML all fit this model. - Source: dev.to / 6 months ago
Once all the important tech is in-place to enable software delivery, the necessary augmentation is what comes next. Documentation is a non-negotiable demand of the craft, and tools like PlantUML and Mermaid have enabled maintenance of... - Source: dev.to / about 1 year ago
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