ChartCool

ChartCool targets people who need presentable charts but do not want to wrestle with spreadsheets or charting code. The workflow is deliberately short: bring your data, type something like 'compare quarterly sales with a different colour per quarter and highlight the highest bar', and the tool selects a chart type, applies a colour scheme and produces the visual — along with a short written read of what the data shows. Everything runs in the browser, so the whole loop can take seconds rather than the usual back-and-forth of configuring axes and legends by hand.

The range of supported visuals is broad for a free tool, covering line, bar, pie, scatter, radar, heatmap and more than a dozen other chart forms, which makes it practical for reports, slide decks, newsletters and dashboards. Exports come out crisp enough for presentations, with PNG available on the free tier and SVG/PDF unlocked on the paid plan for anyone who needs vector-quality output or print-ready files.

Beyond the interface, ChartCool also exposes its chart engine as infrastructure: a single REST endpoint accepts CSV or JSON plus a prompt and returns an ECharts configuration, and an MCP server lets AI agents and tools such as Claude Desktop or GitHub Copilot call it natively. There is an OpenAPI 3.0 schema for API clients, and the free tier includes a small daily allowance of API calls, so developers can prototype integrations before committing to a paid plan.