ChartBytes

A dead-simple API that turns a URL into a chart image — for emails, READMEs, Notion, reports.

Example

GET /chart?t=bar&d=12,19,8,24&labels=Q1,Q2,Q3,Q4&title=Sales&format=png

Chart types

bar · hbar · stacked · pie · donut

Params

• t / type — chart type (required)
• d / data — comma-separated numbers; | separates series (required)
• labels — comma-separated labels
• title — chart title
• w/width, h/height — size (default 600×300)
• format — png (default) or svg
• theme — light (free) · dark, brand (Pro)

Pro

Free: 500 renders/mo, light theme, no watermark. Pro ($9 one-time): dark/brand themes, 25k renders/mo, immutable caching. Get Pro →