Blob Generator

Shape smooth organic SVG blobs online, then export in one click — as an SVG, a transparent PNG or a CSS background. Free and unlimited.

Presets

Shape

Complexity6Contrast35%Smoothing100%

Colour

FromMidTo

CSS

.blob {
  background-image: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2…");
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
}

Shortened for display — Copy CSS copies the full data-URI.

An organic blob in three moves

A blob is a soft, irregular rounded shape — the friendly organic form behind modern hero art, sticker avatars, image masks and decorative backdrops. Because it is generated as vector math, it stays perfectly smooth at any size and weighs almost nothing. Here you shape it live and recolour it with a gradient.

1Explore. Hit Randomize (or press Space) until a shape feels right.
2Refine. Dial in the complexity, contrast, smoothing and the two gradient colours.
3Export. Download the SVG or a transparent PNG, copy the markup, or paste the CSS background straight into your stylesheet.

Need a divider instead of a shape? The SVG wave generator runs on the same vector engine. Drop your blob over a mesh gradient backdrop, or mask it across a tiled pattern for contrast.

Good to know

SVG file, markup or CSS — which do I use?

Download SVG for a file you can drop into any design tool or <img>; Copy SVG to paste the markup inline and animate or recolour it; Copy CSS for a ready-made background-image data-URI — perfect for a decorative backdrop with no extra HTTP request.

Can I use a blob to mask an image?

Yes — that is one of the most popular uses. Take the blob's <path> from the copied SVG and reference it from a clip-path or an SVG <mask> to crop a photo into the blob shape.

Will it stay sharp on every screen?

Yes. It is pure vector, so it scales to any size — from a tiny avatar to a full-bleed hero — without a single soft pixel, and the file stays tiny.

Is it free for commercial use?

Completely. Everything you generate is yours to use freely in personal and commercial work — no sign-up, no limits and no attribution required.

What an SVG blob actually is

A blob is not a freehand doodle — it is a single closed path built from a handful of points placed evenly around an invisible circle, each one nudged in or out by a different amount. Joining those points with smooth Bézier curves rather than straight lines is what gives the shape its soft, liquid silhouette. Because the whole thing is described as vector maths in an <svg> path, it scales to any size without a single jagged edge and the file stays tiny — usually well under a kilobyte. The controls here map straight onto that recipe: complexity adds or removes points around the circle, contrast exaggerates how far each one strays from the radius, and smoothing relaxes the curve handles so the outline ranges from gently rounded to lively and pinched. Adjust them together and you reshape the whole form in real time.

Where designers use blobs

Blobs do quiet, useful work all over a layout. They make warm hero backdrops and soft accents tucked behind cards, and they shine as image masks — set a blob as a clip-path and a square photo becomes an organic, on-brand cut-out. The same shape frames avatars and stickers, anchors a feature illustration, or animates between forms for a slow, breathing background. How you export depends on the job: choose SVG when you want it razor-sharp and recolourable in code, a transparent PNG when a tool or slide deck needs a flat raster, and the CSS background when you would rather drop the shape in with a single line and no extra markup. One shape, three honest ways to ship it.