Phyllotaxis / Spiral Generator
Grow sunflower-seed spirals from a divergence angle — explore the golden angle and the near-misses around it — then export PNG or SVG.
1,400 seeds · divergence 137.5078° · radius ∝ i^0.50
Divergence angle
Fine control: 137°–138°. The golden angle 137.50776° is the irrational limit; stepping a hair off it swings the seed arcs into new spiral families.
Seeds
Colour gradient
Seed used by Randomise: 11
About this tool
Phyllotaxis is the arrangement of leaves and seeds around a stem, and Vogel's model reproduces it by placing the n-th seed at angle n × θ on a radius proportional to √n. At the golden angle of 137.50776° the seeds pack with almost no visible spokes; nudge the angle by a few thousandths of a degree and the pattern collapses into clear spiral families, which is why the fine-angle slider is there. Everything is computed and drawn in your browser, and both the PNG and the SVG are produced locally.
- 100% free — no account needed
- Runs in your browser
- Nothing is uploaded
Frequently asked questions
Is Phyllotaxis Spiral Generator really free?
Yes. Phyllotaxis Spiral Generator is completely free on PureBrowser — every feature, with no account, no trial, and no credit card.
Does Phyllotaxis Spiral Generator upload my data?
No. Phyllotaxis Spiral Generator runs entirely inside your browser, so anything you type, paste, or open stays on your own device.
Do I need to sign up or install anything?
Neither. There is no account and nothing to download — open the page and Phyllotaxis Spiral Generator is ready to use on desktop or mobile.
Does Phyllotaxis Spiral Generator work offline?
Once the page has loaded, yes. All of the processing happens locally in your browser, so it keeps working without a connection.
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