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A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Choose based on the diagram you need and where it has to render: use Mermaid or PlantUML when you want diagrams defined as text, and consider an AWS-listed visual diagramming tool when you prefer a graphical workflow or need AWS icons. These are not direct equivalents: Mermaid and PlantUML are diagram languages and renderers, while AWS provides icon assets and lists third-party tools.
What is the difference between Mermaid, PlantUML, and AWS diagram tools?
Mermaid and PlantUML let you write a textual definition that a compatible renderer turns into a diagram. AWS architecture icons are visual assets, not a diagram language or editor. AWS also maintains a directory of third-party diagramming products, including Cacoo, Creately, Cloudcraft, draw.io, and Figma; the directory is not a ranking or a comparison of their features.
That distinction matters when choosing: compare Mermaid with PlantUML as text-based authoring options, then compare AWS-listed tools if you want a visual editor or need a particular workflow for AWS service icons. A tool can use AWS icons without being an AWS diagram format.
When should you use Mermaid?
Mermaid is a JavaScript-based diagramming and charting tool. You describe a diagram using Markdown-inspired text, then render it. Its documented diagram types include flowcharts, sequence diagrams, use-case and Gantt diagrams, class diagrams, Git graphs, user journeys, and quadrant charts. The project describes ways to embed Mermaid in applications and production scripts, and provides a Live Editor for creating diagrams without first integrating the renderer. Mermaid project overview
#1 Best Overall
It is a good fit when your team wants diagrams maintained as text alongside documentation or code, and the specific diagram type is supported by the renderer in your publishing environment. Do not assume that every host supports the same Mermaid version or diagram features: check the version and render a representative diagram where it will be published.
Mermaid for architecture diagrams
Mermaid’s architecture-beta syntax is available starting in Mermaid v11.1.0. It models architecture with groups, services, edges, and junctions. The documented randomize option requires v11.14.0 or later, while align requires v11.16.0 or later. Conflicting alignment and edge direction can also prevent a diagram from rendering. Mermaid architecture diagram documentation
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If your host uses an older Mermaid version, architecture diagrams—or layouts that rely on those newer options—may fail even when the source syntax is correct. Confirm the renderer version before making these features part of a team standard.
When should you use PlantUML?
PlantUML is another text-based diagram language. Its Language Reference Guide 1.2025.0 documents both an Amazon Labs AWS library and a C4 library. The AWS library supplies sprites, macros, and includes for AWS services and resources; the guide says its elements are generated from official AWS Architecture Icons. PlantUML Language Reference Guide 1.2025.0
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- Sold as 1 Each.
- All Grades. Helpful for visual learners, this book dissects sentences so students are better able to grasp the writing concepts behind it.
- Provides opportunities to segment the parts of sentences for better understanding of the English language.
- Includes an answer key and glossary.
- 48 pages.
PlantUML is worth considering if you want textual diagram definitions and the documented AWS or C4 libraries suit your diagrams. The reference establishes that these libraries exist, but does not establish whether a particular documentation host has them available or which library version it uses. Check the standard-library version and test rendering in the environment your team actually uses.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When should you use AWS icons or an AWS-listed visual tool?
Choose a graphical tool when you prefer drawing and editing visually, or when the workflow depends on a vendor’s particular editing and collaboration features. AWS lists providers such as Cacoo, Creately, Cloudcraft, draw.io, and Figma alongside its architecture icon resources. The listing does not establish equivalent features, prices, integrations, or certification for those products, so verify those details with the vendor before choosing.
Rank #4
AWS publishes approved architecture icons and toolkits for use in diagrams and related materials. AWS warns that third-party libraries may contain legacy icon sets, so check the asset version if current AWS service visuals matter. AWS states that icon packages are released in Q1 (at the end of January), Q2 (at the end of April), and Q3 (at the end of July), with no Q4 release. AWS architecture icons
The official icon package is an asset source; it does not by itself provide a graphical editor or decide which third-party tool is right for your team. If you use an AWS library inside a text-based format or a visual tool, check that the icons in the rendered output are current.
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How to choose for your project
- Start with the diagram. Identify whether you need a sequence view, class model, cloud architecture diagram, or another specific artifact. Mermaid’s overview documents many diagram types; the cited PlantUML reference specifically establishes AWS and C4 libraries. Confirm that the intended renderer supports your required diagram.
- Choose the authoring workflow. If diagrams should be text definitions maintained with documentation or code, evaluate Mermaid and PlantUML. If you want a graphical workflow, evaluate the AWS-listed products directly; AWS’s directory does not compare their editing or collaboration features.
- Check icon requirements. If recognizable AWS service icons are essential, compare PlantUML’s AWS library with using AWS’s official icon package in a visual tool. Check when the library or package was updated, since AWS cautions that third-party icon sets can lag.
- Verify versions and rendering. Pin or confirm the version used by your documentation host or build. For Mermaid architecture syntax, the baseline is v11.1.0, with later minimums for
randomizeandalign. For PlantUML, confirm the standard-library availability in your environment. - Test the finished output. Render a representative diagram in the actual documentation site, code-hosting platform, presentation, or publishing workflow. Mermaid documents embedding and production use, but compatibility and feature parity in a specific host must be checked in that host.
Which option is the best fit?
| Need | Best starting point | What to verify |
|---|---|---|
| Text-authored diagrams across several documented diagram types | Mermaid | Diagram support and Mermaid version in the final renderer |
| Text-authored diagrams with documented AWS or C4 libraries | PlantUML | Standard-library version and availability in the rendering environment |
| Graphical editing or use of AWS icon assets in a visual workflow | An AWS-listed diagramming tool | Vendor features, pricing, integrations, collaboration options, and icon freshness |
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