The set of complex numbers c for which z → z² + c stays bounded from z = 0. Points outside are shaded by how fast they escape, smoothed to a continuous value so the bands have no stair-steps.
| drag | pan |
| wheel / pinch | zoom at the pointer |
| double-click | zoom in 3× (shift: zoom out) |
| shift + drag | zoom to a box |
| hover | preview the Julia set for that point |
| + - | zoom in / out |
| ←↑↓→ | pan (hold shift for a big step) |
| [ ] | halve / double max iterations |
| P | next palette |
| J / O | toggle Julia inset / orbit trace |
| S / C | save PNG / copy link |
| R | reset view |
| F | fullscreen |
| H or ? | this panel |
The view is stored in the URL, so any link you copy reopens exactly this frame. Rendering is split across web workers with a coarse-to-fine pass, and iteration counts are cached so palette changes recolor without recomputing.
Arithmetic is IEEE double precision, which runs out at roughly 1013× zoom. The readout turns magenta as pixels stop being distinguishable.