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ChartBytes Verified
Chart image API — turn a URL into a PNG or SVG chart for email, READMEs, Notion.
Screenshot of haswell119.github.ioOpen website ↗
About this tool
ChartBytes renders bar, horizontal bar, stacked bar, pie and donut charts as PNG or SVG from a single URL. Charts are generated server-side, so a plain img tag or Markdown image works anywhere that cannot run JavaScript - email clients, GitHub READMEs, Notion, Slack and PDF reports. Free tier: 500 renders/month with no watermark and no account. Pro: one-time USD 9 for dark and brand themes, 25,000 renders/month and immutable caching. Open source (MIT), pre-revenue.
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