Comparison · October 2026
draw.io vs Mermaid Online
draw.io (diagrams.net) is one of the best free drag-and-drop diagram editors, and draw.io can even insert Mermaid text now. So the choice is not GUI versus text as a rule — it is which workflow your diagram lives in. Diagram-as-code is reviewable in pull requests and regenerates in seconds; a GUI gives you exact positions, layers, and huge cloud shape libraries. Here is how the two compare, fact by fact.
Free · No watermark · Text to diagram in seconds · Local browser rendering
Side by side
as of October 2026 · verified against draw.io's public pricing and product pages
| Feature | Mermaid Online | draw.io |
|---|---|---|
| Input model | Write Mermaid text; layout is computed automatically | Drag shapes and route connections with the mouse |
| Mermaid support | Native — the editor is built around Mermaid | Yes — Arrange → Insert → Mermaid converts text into editable shapes |
| Shape libraries | Mermaid node styles and 9 designed export presets | Extensive: AWS, Azure, GCP, Kubernetes, networking, UML, BPMN and more |
| Layout control | Automatic layout and theme presets; no manual nudging | Full manual control — exact positions, layers, and connectors |
| Speed for text you already have | Paste code, get a finished diagram in seconds | Minutes of manual arranging for the same diagram |
| Version control | Plain text that diffs and reviews line by line in pull requests | XML files are diff-able but changes are noisy to review |
| Collaboration | Share links and a cloud library; no real-time multi-cursor | Real-time collaboration in the Confluence and Jira integrations |
| Export formats | PNG, SVG, JPG, WebP, PDF at 1x–4x | PNG, SVG, PDF, VSDX and many more, including Visio import |
| Price | Free editor and exports; Pro $5.99/mo adds AI and the cloud library | Web and desktop editor free; Confluence/Jira/Drive integrations are paid apps |
draw.io (diagrams.net) is a free diagram editor from JGraph with web and desktop apps; its Confluence, Jira, and Google Drive integrations are paid apps sold through marketplaces. This page states verifiable public facts only; check both tools before you decide.
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FAQ
Questions about this comparison
Is draw.io free?+
Yes. The web editor at diagrams.net and the desktop app are free to use. The paid parts are the Confluence, Jira, and Google Drive integrations sold through the Atlassian and Google marketplaces.
Can draw.io render Mermaid?+
Yes. Arrange → Insert → Mermaid (or the + toolbar icon) converts Mermaid text into native draw.io shapes you can then edit. One caveat: when you re-edit the Mermaid source and regenerate, geometry changes are discarded — only styling and label changes persist. Inserting it as a static SVG image is also supported.
Which is better for READMEs and docs-as-code, Mermaid or draw.io?+
Mermaid. The diagram lives in the repository as text, renders natively on GitHub and GitLab, and every change is a reviewable diff. In draw.io the same diagram is an XML file or an exported image that must be regenerated by hand.
Which is better for cloud architecture diagrams, Mermaid or draw.io?+
draw.io, comfortably. Its AWS, Azure, GCP, and Kubernetes shape libraries cover official icons that Mermaid's node styles cannot match. Mermaid wins when the diagram is conceptual — flows, sequences, timelines — rather than an icon-accurate cloud layout.
Can I move diagrams between Mermaid and draw.io?+
In one direction easily: draw.io inserts Mermaid text directly. In the other, export an SVG or PNG from Mermaid Online and place it on a draw.io canvas as an image — it will not become editable draw.io shapes.
Is Mermaid Online affiliated with draw.io or Mermaid.js?+
No. Mermaid Online is an independent tool and is not affiliated with draw.io, JGraph, Mermaid.js, or their maintainers.