Nightingale Rose Chart Generator
Turn labeled non-negative values into an equal-angle polar-area chart, adjust its palette, and download a PNG locally.
A QUICK WALKTHROUGH
How to use this tool
- Enter one label and value per line.
- Choose the starting color and chart title, then draw the chart.
- Review the values and download a 1200 × 1200 PNG.
Area-based wedges
Each wedge has the same angle. Radius is scaled by the square root of value, making wedge area proportional to the entered number. This avoids the common mistake of mapping value directly to radius.
Local limits
Enter 1 to 20 rows. Labels are limited to 60 characters and finite values to 0–1,000,000,000,000. Rendering and PNG export stay in the browser.
GOOD TO KNOW
Common questions
How does this differ from a pie chart?
Every category uses the same angle. The wedge area changes with the value, while a pie chart varies slice angles.
Is my data uploaded?
No. Parsing, drawing, and PNG export happen locally.