SVG Blob Generator: Make Organic Shapes and Wave Dividers in Your Browser

For years, the cleanest way to make a website feel modern was the perfect rectangle: cards, hero banners, neat grids. Then the design pendulum swung. Organic, hand-drawn, slightly irregular shapes — the kind you cannot draw twice the same way — became the signature of friendly, human-feeling interfaces. These are blobs: smooth, closed, asymmetric shapes that sit behind headlines, frame avatars, and break up otherwise rigid layouts. The trouble is that drawing a good blob by hand in a vector editor is fiddly, and exporting clean SVG from those tools often leaves you with bloated markup.

The BrowseryTools SVG Blob Generator solves this in your browser. It is an organic shape maker that produces a smooth, closed bézier path from a set of randomized points around a center, and it hands you clean, copy-paste-ready SVG. No account, no upload, no watermark — every shape is computed locally with a little geometry and a seeded random number generator.

What a blob actually is, under the hood

A blob looks freeform, but it is built from a tidy bit of math. The generator places a number of points at evenly spaced angles around a circle. Each point's distance from the center is then nudged in or out by a random amount. If you connected those points with straight lines you would get a jagged polygon. Instead, the tool runs them through a Catmull-Rom-to-bézier conversion, which threads a smooth cubic curve through every point and closes the loop. The result is the soft, pebble-like outline you see in the preview.

Two controls shape the personality of the blob. Complexity sets how many points sit around the circle — fewer points give you a calm, rounded shape, more points give you a wavier, busier outline. Randomness controls how far each point is allowed to drift from the base radius — at zero you get a near-perfect circle, and as you push it up the shape becomes more irregular and characterful. Between those two sliders you can dial in anything from a gentle pill shape to a dramatic splat.

Solid or gradient fill

Color is where blobs earn their keep. A flat solid fill is great for subtle background accents — drop a pale blob behind a section and it adds depth without shouting. Switch to a gradient fill and the generator writes a real SVG linearGradient into the markup, blending your start and end colors across the shape. Gradients are what make blobs feel premium: pair two analogous hues for a soft glow, or two contrasting hues for a bold, energetic accent. Because the gradient lives inside the SVG, it scales perfectly and never pixelates.

Wave dividers: the second mode

Blobs are not the only organic shape designers reach for. Section dividers — the gentle wave that separates a colored hero from the white content below — are everywhere on modern marketing pages. The generator includes a wave dividermode that builds a smooth curve across the full width of the SVG and fills down to the bottom edge, giving you a ready-to-drop divider. The same randomness and complexity sliders apply, so you can make a barely-there ripple or a tall, rolling wave. Set the fill to your section's background color and the divider blends seamlessly.

How to use it

1. Open the SVG Blob Generator and pick a mode — blob or wave divider.
2. Adjust complexity and randomness until the shape feels right in the live preview.
3. Set the size, then choose a solid color or a gradient with start and end colors.
4. Hit Regenerate as many times as you like — each press reseeds the shape, so you keep rolling until you love one.
5. Copy the SVG markup straight into your HTML or React component, or download a .svg file for your design tool.

Why generate SVG instead of exporting PNG

It is tempting to screenshot a shape and ship a PNG, but SVG wins on every axis that matters. SVG is resolution-independent, so your blob is razor sharp on a 4K monitor and a retina phone alike. The file is tiny — usually a few hundred bytes of text — which keeps your pages fast. And because it is just markup, you can recolor it with CSS, animate it, or tweak the path by hand without re-exporting anything. If you ever do need a raster version, you can pass the output straight through our SVG to PNG converter.

Everything stays on your device

Like all BrowseryTools utilities, the SVG Blob Generator runs entirely in your browser. The points, the curves, the gradient — all computed in JavaScript on your machine. Nothing is uploaded, nothing is logged, and there is no sign-up wall between you and a finished shape. Open it, generate a blob or a wave, copy the markup, and get back to designing.