Generate a reproducible pattern from a seed, then refine its symmetry and colors.
Draw one stroke and watch it repeat across every sector. Pointer capture keeps finger and stylus strokes connected.
Symmetry: reflection symmetry with 12 mirrored sectors.
These live previews show how mode, sector count, and reflection change the result. Use the listed settings or choose a related preset to start.
Sector angle = 360° ÷ number of sectors. A 12-sector design repeats every 30°. With reflection off, each sector is a rotated copy: this is rotational symmetry. With reflection on, alternate sectors are flipped as well as rotated, creating the reflection symmetry associated with a physical kaleidoscope.
| Sectors | Angle per sector |
|---|---|
| 6 | 60° |
| 8 | 45° |
| 12 | 30° |
| 16 | 22.5° |
| 24 | 15° |
Start with Pastel Mandala, keep the important detail near the center, and export at 2048 px for room to crop to your phone’s portrait ratio.
Use Snowflake, then compare 6, 8, and 12 sectors with reflection on and off. The angle readout makes the 360° ÷ sectors relationship visible.
Try Stained Glass, increase line thickness, choose a light background, and export at 2048 px. PNG output is raster, so check print size before large-format printing.
Use Neon Star or a local photo with 8–12 sectors. Export at 1024 px for a square post, then add text in your preferred design app.
Select Floral Rosette, a low motion speed, and optional breathing. Keep motion paused if animation is distracting.
Use Monochrome Geometry, adjust scale and complexity, and export a 2048 px reference for textile, logo, tile, or ornament studies.
Yes. The generator, drawing tools, photo mode, and PNG export are free to use in your browser.
Yes. Choose a square size of 512, 1024, or 2048 pixels and download the result as a PNG, or use Copy Image when your browser supports it.
Keep the displayed seed or use Copy Share Link. The link stores the seed and major pattern settings, but it does not contain an uploaded photo or drawing strokes.
The slice count is the number of repeated sectors in a full circle. The sector angle equals 360 degrees divided by the slice count.
It can be. Turn Mirror reflection on to reflect every other sector. With it off, the tool uses rotational repetition only.
Yes. Choose Photo mode, select an image from your device, and adjust rotation, zoom, center position, scale, sectors, and reflection.
Yes. The layout is responsive, and Draw mode uses Pointer Events for finger, stylus, and mouse input.
Photo processing happens locally in this browser tab. The selected image is not uploaded by this tool or stored in the share link.
Processing: generated patterns, drawing strokes, and selected photos are processed locally in this browser tab. This page does not send the photo to a server.
Retained data: the current drawing and photo remain in page memory until you refresh or close the tab. Share links contain settings and a seed, never photo pixels or drawing strokes.
Export: square PNG files at 512, 1024, or 2048 pixels. Copy Image depends on browser clipboard support.
Limitations: export is square and raster-only; animated output, SVG, project files, non-square crops, and restoration of photo/drawing content from a link are not supported.
Accessibility: controls have labels and keyboard focus styles. Motion starts paused; reduced-motion preferences are respected.
Last tested: 18 July 2026 in current Chromium, including the 390-pixel responsive layout, mode changes, history, photo decoding, symmetry readouts, presets, URL state, and PNG canvas creation.
