pptx-creator

PowerPoint Presentation Skill (PPTX)

Three Workflows

Workflow	When to Use
Read	Extract text, generate thumbnails from an existing PPTX
Create	Build a new presentation from scratch using pptxgenjs
Edit	Unpack XML, modify content, repack existing PPTX

---

Workflow 1: Reading an Existing PPTX

Extract Text (requires markitdown)

pip install markitdown

from markitdown import MarkItDown

converter = MarkItDown()
result = converter.convert("presentation.pptx")
print(result.text_content)  # all slides as markdown

Generate Slide Thumbnails

# Requires LibreOffice
libreoffice --headless --convert-to png presentation.pptx
# Generates: Slide1.png, Slide2.png, ...

---

Workflow 2: Create a New Presentation with pptxgenjs

Setup

npm install pptxgenjs

Complete Example

const PptxGenJS = require('pptxgenjs')
const pptx = new PptxGenJS()

// Set presentation properties
pptx.layout = 'LAYOUT_WIDE'  // 16:9
pptx.author = 'Claude'

// ─── SLIDE 1: Title Slide ───────────────────────────────────────────────────
const slide1 = pptx.addSlide()
slide1.background = { color: '1a1a2e' }  // dark navy

slide1.addText('Quarterly Review', {
  x: 1, y: 1.5, w: 8, h: 1.5,
  fontSize: 48, bold: true, color: 'ffffff',
  align: 'center', fontFace: 'Georgia',
})

slide1.addText('Q1 2026 Results', {
  x: 1, y: 3.2, w: 8, h: 0.8,
  fontSize: 24, color: 'e0e0e0',
  align: 'center',
})

// ─── SLIDE 2: Content Slide ─────────────────────────────────────────────────
const slide2 = pptx.addSlide()

// Title
slide2.addText('Key Metrics', {
  x: 0.5, y: 0.3, w: 9, h: 0.8,
  fontSize: 32, bold: true, color: '1a1a2e',
})

// Divider line (using shape)
slide2.addShape(pptx.ShapeType.rect, {
  x: 0.5, y: 1.15, w: 9, h: 0.05,
  fill: { color: '4a90e2' }, line: { color: '4a90e2' },
})

// Bullet points
slide2.addText([
  { text: 'Revenue: ', options: { bold: true } },
  { text: '$2.4M (+18% YoY)' },
], { x: 0.7, y: 1.5, w: 8.3, h: 0.5, fontSize: 18, color: '333333' })

slide2.addText([
  { text: 'Users: ', options: { bold: true } },
  { text: '142,000 active (+32%)' },
], { x: 0.7, y: 2.1, w: 8.3, h: 0.5, fontSize: 18, color: '333333' })

// ─── SLIDE 3: Chart Slide ───────────────────────────────────────────────────
const slide3 = pptx.addSlide()
slide3.addText('Monthly Revenue', {
  x: 0.5, y: 0.3, w: 9, h: 0.8,
  fontSize: 28, bold: true, color: '1a1a2e',
})

slide3.addChart(pptx.ChartType.bar, [
  {
    name: 'Revenue ($K)',
    labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun'],
    values: [180, 210, 195, 240, 225, 280],
  }
], {
  x: 0.5, y: 1.2, w: 9, h: 4.5,
  chartColors: ['4a90e2'],
  showLegend: false,
  valAxisLabelFontSize: 12,
  catAxisLabelFontSize: 12,
})

// Save
await pptx.writeFile({ fileName: 'quarterly-review.pptx' })
console.log('Presentation saved.')