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Build coxcomb charts (also known as polar area charts, Nightingale rose charts or rose diagrams) online in minutes with the MLC Free Coxcomb Chart Maker. Each category gets an equal-angle wedge whose radius scales so the area is proportional to the value — the honest way to draw a rose chart. Export to native editable PowerPoint shapes, high-res PNG and a clean Excel file. No signup, no download, no watermark. 100% free forever.
Most tools that can draw polar area charts are heavyweight BI suites, or they export only a flat image. The MLC Coxcomb Chart Maker is different: you build the chart in the browser, preview it in real time, and export a native .pptx slide where every wedge is a real PowerPoint shape you can recolor, resize, and restyle directly in your deck.
Coxcombs shine with cyclical data: sales by month, tickets by weekday, traffic by hour, wind by direction. Florence Nightingale invented the form in 1858 to show causes of mortality month by month — the equal angles keep the cycle readable while the radius shows magnitude. They also work as a bolder, more memorable alternative to bar charts when you have 5-12 categories.
Six visual styles: Classic Rose, Donut Rose (center hole), Outline, Gradient, plus two multi-series modes — Nightingale (up to three series layered from the center, exactly like the 1858 original) and Stacked Rose (series stacked outward, with cumulative areas still value-true). Load the historical Nightingale 1854 dataset from the Import menu to see the original recreated. Twelve curated color palettes. True area-proportional scaling. Values and category labels you can toggle. Custom slide background and four fonts. Import from CSV or paste from any spreadsheet.
Is this coxcomb chart maker really free? Yes, 100% free forever. No signup, no credit card, no watermark.
Coxcomb vs pie chart? A pie varies angles at fixed radius; a coxcomb keeps angles equal and varies the radius. Better for cycles and for comparing many categories.
Can I export to PowerPoint with editable shapes? Yes. Every wedge in the exported .pptx is a real PowerPoint shape.
Prefer a head start? Browse our ready-made chart templates — open one, edit it, export to PowerPoint.
Built by MLC Presentation Design Consulting, helping professionals communicate better through presentation design, data storytelling, and AI adoption.
No passwords, no signup loops, no fees. Leave your details once and every MLC chart maker unlocks for 90 days on this device.
By Maurizio La Cava · MLC Presentation Design Consulting
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