Render Chart.js, Mermaid, Graphviz, and Vega-Lite to PNG or SVG with a single API call. No browser, no headless Chrome, no config.
curl -X POST https://api.chartforge.dev/v1/render/chart \ -H "Authorization: Bearer cf_live_..." \ -H "Content-Type: application/json" \ -d '{"type":"bar","data":{"labels":["Q1","Q2","Q3","Q4"], "datasets":[{"label":"Revenue","data":[42,58,73,91]}]}}' \ -o chart.png
Pick the right tool for the job. Same endpoint shape, same auth, same caching.
Bar, line, pie, radar, scatter, bubble — all the classics.
Flowcharts, sequence diagrams, Gantt charts, class diagrams.
Directed graphs, dependency trees, network topologies in DOT language.
Declarative statistical visualizations from JSON specs.
Free tier, no credit card. Enter your email and claim your key instantly.
Send a Chart.js config, Mermaid diagram, DOT graph, or Vega-Lite spec as JSON.
PNG or SVG bytes in the response. Cache hits are free and don't count against your quota.
Cached renders are free on every plan.