ChartBytes
Chart images from a URL: server-side PNG/SVG for email, READMEs and reports
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About ChartBytes
ChartBytes is a chart image API. Build a URL (GET /chart?t=line&data=...) and get back a PNG or SVG you can embed with a plain <img> tag in email, READMEs, Notion or Slack. 8 chart types (bar, hbar, stacked, line, area, scatter, pie, donut). Free 500 renders/month, no watermark; one-time $9 Pro adds dark/brand themes and higher limits. MIT source on GitHub.
