Overview

Beyond standard columns, lines, and pies, the pptx.dev API supports specialty chart types for advanced data visualization. These charts help you communicate complex data patterns that basic charts cannot express.

Specialty Chart Types

Waterfall Chart

Perfect for showing how a starting value is affected by positive and negative changes:

{
  "layout": "chart-1x-title-center",
  "content": {
    "heading": "Revenue Bridge — Q1 to Q2",
    "chart": {
      "type": "WATERFALL",
      "categories": ["Q1 Revenue", "New Sales", "Upsells", "Churn", "Downgrades", "Q2 Revenue"],
      "series": [
        { "name": "Revenue ($K)", "values": [400, 120, 45, -30, -15, 520] }
      ]
    }
  }
}

Funnel Chart

Visualize conversion through stages:

{
  "layout": "chart-1x-title-center",
  "content": {
    "heading": "Sales Funnel — March 2026",
    "chart": {
      "type": "FUNNEL",
      "categories": ["Leads", "Qualified", "Demo", "Proposal", "Closed Won"],
      "series": [
        { "name": "Count", "values": [1200, 480, 180, 72, 28] }
      ]
    }
  }
}

Treemap Chart

Show hierarchical data as nested rectangles:

{
  "layout": "chart-1x-title-center",
  "content": {
    "heading": "Revenue by Product Category",
    "chart": {
      "type": "TREEMAP",
      "categories": ["Enterprise SaaS", "Mid-Market", "SMB", "Consulting", "Training"],
      "series": [
        { "name": "Revenue ($K)", "values": [320, 180, 95, 45, 20] }
      ]
    }
  }
}

Scatter Chart

Show correlation between two variables:

{
  "layout": "chart-1x-title-center",
  "content": {
    "heading": "Deal Size vs. Sales Cycle Length",
    "chart": {
      "type": "SCATTER",
      "series": [
        {
          "name": "Deals",
          "values": [
            { "x": 15, "y": 5000 },
            { "x": 30, "y": 12000 },
            { "x": 45, "y": 28000 },
            { "x": 60, "y": 55000 },
            { "x": 90, "y": 120000 }
          ]
        }
      ]
    }
  }
}

Radar Chart

Compare multiple dimensions at once:

{
  "layout": "chart-1x-title-center",
  "content": {
    "heading": "Product Feature Comparison",
    "chart": {
      "type": "RADAR_WITH_MARKERS",
      "categories": ["Speed", "Reliability", "Features", "Support", "Price"],
      "series": [
        { "name": "Our Product", "values": [9, 8, 7, 9, 6] },
        { "name": "Competitor", "values": [6, 7, 9, 5, 8] }
      ]
    }
  }
}

Map Charts

Visualize data geographically:

{
  "layout": "chart-1x-title-center",
  "content": {
    "heading": "Revenue by Region",
    "chart": {
      "type": "UNITED_STATES",
      "categories": ["California", "Texas", "New York", "Florida", "Illinois"],
      "series": [
        { "name": "Revenue ($K)", "values": [450, 280, 320, 190, 150] }
      ]
    }
  }
}

Choosing the Right Specialty Chart

Next Steps

• Start with column and bar charts for basic comparisons
• Learn about line charts for trends
• See all chart types