Short answer
Paste your code into the editor, open the ▾ next to "Download PNG" and pick PowerPoint. The .pptx opens in PowerPoint, Keynote and Google Slides: slide one is the diagram laid out to the slide, the last slide carries the original Mermaid code so the next revision starts from text.
Two things worth doing first
- Switch the theme. The default light theme washes out on a projector. The themes in the strip above the preview hold up better in a room, and the exported background follows whatever you're looking at.
- Turn the flow sideways. Flowcharts default to top-down, which leaves a tall narrow diagram on a wide slide. Use "Layout" above the preview to switch direction to left-to-right and it fills the slide.
Try it
mermaidOpen in the editor
flowchart LR
A[Discovery] --> B[Design]
B --> C[Build]
C --> D[QA]
D --> E{Approved?}
E -- Yes --> F[Launch]
E -- No --> CEdit the text, switch themes and download PNG, Word or PowerPoint from there.
Several diagrams at once
"Batch / bundle export" in the download menu renders several diagrams in several formats and packs them into one zip. That one is part of Pro.