Draw Fibonacci Rectangles/Seed Head
Visual Fibonacci patterns. Runs entirely in your browser, so your data never leaves your device.
Output
The result appears here as you type.
How to use Draw Fibonacci Rectangles/Seed Head
- 1. Choose the visualization mode. Pick Fibonacci rectangles for the classic tiling with a golden spiral overlay, or Seed head for the sunflower-style phyllotaxis pattern, from the Mode setting.
- 2. Set the number of seeds. Enter a value in Seeds to control how many points appear in the seed head pattern. More seeds produce a denser, more detailed spiral arrangement.
- 3. Adjust the canvas and styling. Set Width and Height for the drawing, and choose Line color and Background color along with Line width to style the resulting image.
- 4. Review or download the drawing. The tool renders an SVG showing either the tiled rectangles with the golden spiral or the sunflower seed head pattern, ready to view or save.
When to use Draw Fibonacci Rectangles/Seed Head
Draw Fibonacci Rectangles/Seed Head visualizes two classic expressions of the golden ratio in nature and geometry: the nested golden rectangles with their spiral, or the sunflower seed head's phyllotaxis pattern.
- Illustrating the golden ratio for a lesson. A geometry class covering the golden ratio benefits from a clear image of the nested squares and spiral, making the abstract 1.618 ratio visually concrete for students.
- Recreating a sunflower's seed pattern. A biology or math lesson on phyllotaxis wants to show how sunflower seeds arrange using the golden angle, and the Seed head mode renders that exact pattern.
- Generating a background for a design project. You want an aesthetically pleasing spiral pattern as a background element for a poster or website, and adjusting the seed count and colors gives you a customized image.
- Comparing rectangle count to seed density. You are exploring how increasing the seed count changes the visual density of the phyllotaxis pattern, rendering several versions at different Seeds values to compare.
Examples
The golden-rectangle tiling
Output
An SVG of fibonacci squares spiraling around each other with the golden spiral overlaid.
A 500-seed sunflower head
Output
An SVG Vogel-model seed head using the golden angle.
About the Draw Fibonacci Rectangles/Seed Head tool
Draw Fibonacci Rectangles/Seed Head runs as plain JavaScript in your browser tab, with no server behind it. Visual Fibonacci patterns. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's Math Tools section, 234 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
You can shape the output with 7 settings, including Mode, Seeds, Width (px) and Height (px), and the result refreshes the moment you change one. 2 worked examples further down the page show exactly what the tool produces for real inputs.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Does Draw Fibonacci Rectangles/Seed Head cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Does the generator send anything to a server?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
How do I get a different result?
Run the generator again. Each run is computed fresh on your device, and any options you change are applied to the next result immediately.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
Can I save what the tool produces?
Yes. Use the download or copy controls in the output panel to keep the rendered result once it looks the way you want.