A Droste effect generator for any photo

PhotoSpiralysis makes the Droste effect — a picture that contains itself, over and over, spiralling in without end — from a photo of your own. Mask the part that repeats with a circle, a polygon or a colour key, tune the zoom and rotation with a live preview, and export at full resolution. Everything happens on your device; your photo is never uploaded.

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An online Mandelbrot set explorer

Fractalysis is a free Mandelbrot viewer that runs in your browser, with nothing to install. It zooms far deeper than double precision allows, using perturbation and arbitrary-precision arithmetic, and renders on every core your machine has through WebAssembly. Pan, zoom, pick a palette, light the set with shadows, and save what you find as a PNG.

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