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How an algorithm paints abstract art

This generator builds images from simple geometric rules rather than from a photo or a neural network. You pick one of five styles, a palette, and a complexity level, and the tool draws shape after shape onto an HTML canvas following that style's logic. Because the drawing is deterministic given its inputs, the same settings always produce the same picture — the secret to that reproducibility is the seed, explained below. The result is a 600×600 image you can download as a PNG.

The five styles, and what each one is doing

• Geometric scatters translucent polygons of random size and rotation across a near-black background, layering them so overlaps blend into new colors.
• Watercolour Blobs stacks eight faint, wobbly layers per blob on a warm paper background, mimicking how real watercolour pools and bleeds at the edges.
• Circuit Board snaps nodes to a grid and connects them with L-shaped traces, evoking a printed circuit.
• Voronoi drops seed points and colours every pixel by its nearest point, partitioning the canvas into organic cell-like regions.
• Mondrian recursively splits the canvas into rectangles and fills them with primary colours and bold black grid lines, in the spirit of De Stijl painting.

The seed: why your art is reproducible

This is the feature that separates a toy from a tool. Every random choice the generator makes — positions, sizes, colours, rotations — comes from a seeded random number generator (a mulberry32 PRNG), not the browser's unpredictable Math.random(). A seed is just a number that initializes that generator. Give it the same seed and it produces the exact same sequence of "random" values, so the exact same image. Hit Generate and the tool picks a fresh random seed and shows it to you; type that number back into the seed field and you will recreate the identical artwork every time. That means you can note a seed you liked, share it with someone else, or regenerate a wallpaper at any moment — without storing the image file at all.

A worked example

Choose Mondrian, the warm palette, complexity 5, and generate. Suppose the tool reports seed 482915. The recursive splitter divides the 600×600 canvas with a depth of 3 (complexity under 5 uses depth 3, 5–7 uses 4, 8+ uses 5), filling each final rectangle from the warm palette and overlaying about 10 black grid lines (complexity × 2). Now clear the result and generate again — you get a different layout and a different seed. Type 482915 back into the seed box and press Generate, and the original composition returns pixel-for-pixel. Nudge complexity to 9 with the same seed and you get a busier but recognisably related image, because deeper recursion adds more rectangles.

Palettes and complexity in practice

Five preset palettes (warm, cool, monochrome, pastel) plus a random mode that picks fresh HSL colours, and a custom mode that interpolates a smooth six-step gradient between two colours you choose. Complexity, a 1–10 slider, controls how many elements appear: it multiplies the shape, blob, node, or grid-line count, so low values give clean minimal pieces and high values give dense, busy ones. The two interact — a high-complexity Voronoi with the cool palette looks very different from a low-complexity geometric piece in monochrome.

Use cases

• Unique wallpapers and lock screens. Generate, download the PNG, and you have art nobody else has — then save the seed to recreate it at a higher resolution later.
• Placeholder and background images. Mockups, slide backgrounds, and social cards that need texture without a licensed stock photo.
• Profile and banner art. Pick a custom palette matching your brand colours and generate a coordinated set by reusing nearby seeds.
• Creative starting points. Designers use generated compositions as a base to trace, recolour, or remix.

Tips and common mistakes

• Write down seeds you love. The seed is the only thing you need to recreate an image; lose it and that exact composition is gone, even with identical other settings.
• Generate clears the seed first. Pressing Generate deliberately blanks the seed field so you get something new — to reproduce, type the seed in and Generate again rather than expecting the last one to persist.
• Voronoi is the heaviest style. It colours pixels one by one, so very high complexity can take a moment; the others are near-instant.
• Custom palette needs contrast. Picking two similar colours yields a flat gradient; choose two distinct hues for a livelier interpolation.

Privacy

Every image is drawn locally on a canvas in your browser. Nothing is uploaded, and the PNG download is generated on your device — the tool works fully offline once loaded.