OpenChart
Show HN: Data Visualization for Agents
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What is OpenChart?
OpenChart is a headless charting engine that renders the same JSON specification across React, Vue, Svelte, and vanilla JavaScript. It provides comprehensive data visualization components including bar/column charts, line and area charts, tables with search and sort, network graphs, Sankey diagrams, and dashboards with support for animations, theming, and responsive layouts.
OpenChart pricing
Pricing model: Freemium
OpenChart pros
- Single JSON spec works identically across four frameworks (React, Vue, Svelte, vanilla JS), reducing code duplication and learning curve
- Extensive library of 130+ interactive demos organized by chart type and feature, with copy-paste ready code examples
- Rich visualization options including force-directed networks with community detection, heatmap tables with sparklines and inline bars, and Sankey/tile map diagrams from the same spec
- Comprehensive feature set including annotations, edit mode, animation, data transforms, responsive layout, and interactive capabilities like series search and highlighting
OpenChart cons
- No pricing information or licensing details visible; unclear if free, open-source, or commercial
- Requires familiarity with framework-specific packages and JSON specification to implement
- Limited documentation beyond demo-driven learning; no visible API reference or production usage guidelines in provided content
Frequently asked questions about OpenChart
What frameworks does OpenChart support?
React, Vue, Svelte, and vanilla JavaScript. The same JSON specification renders identically across all four frameworks.
How do I get started with OpenChart?
Install via npm (e.g., `npm i @opendata-ai/openchart-react`), then pass a spec to the Chart component. The encoding maps fields to visual channels; the engine handles rendering.
What visualization types does OpenChart support?
Charts (bar, column, line, area, scatter, pie, donut), tables with heatmap cells and sparklines, force-directed network graphs, Sankey diagrams, tile maps, and dashboard components.